It's just the fourth-level "Sunrise Impression Light Punch", which directly injured the bearded god's body, which shocked the bearded man very much.

"You despicable sub-teacher dare to attack me, the noble main teacher, do you think you can go to heaven? Or do you feel that your own strength has reached a level that no one can beat? Even if your strength reaches the supreme comprehension of beauty, it can't change the fact that you are an associate teacher, nor can it change the fact that the associate teacher is inferior! The bearded man said proudly to Xu Gong in the north of the city, and at the same time did not forget to wipe his nosebleed.

"I take up all the classes of you assistant teachers, and the classes of you assistant teachers have no value at all, do you understand! In my eyes, it's a waste of time for the school to have you as a sub-teacher! And not only did you dare to drag the class, but you even dared to injure the distinguished teacher! I'm going to punish you! Let you understand the difference between dignity and inferiority in this world! The bearded man said, and one after another triangular blades emerged from behind him.

"Eat me trigonometric cut!" The bearded man roared, waved his hand and pointed at Xu Gong in the north of the city, and the thousands of triangular blades shot towards Xu Gong in the north of the city.

Trigonometric function is one of the basic elementary functions, which is a function with angle as the independent variable, and the angle corresponds to the coordinate of the intersection point of the terminal edge of any angle with the unit circle or its ratio as the dependent variable. It can also be defined equivalently in terms of the length of the various line segments related to the unit circle. Trigonometric functions play an important role in the study of the properties of geometric shapes such as triangles and circles, and are also a fundamental mathematical tool for the study of periodic phenomena. In mathematical analysis, trigonometric functions are also defined as infinite series or solutions to specific differential equations, allowing their values to be extended to arbitrary real values, even complex values. Common trigonometric functions include sine, cosine, and tangent. In other disciplines such as navigation, surveying and mapping, and engineering, other trigonometric functions such as cotangent function, secant function, cosecant function, sine function, cosagittal function, semi-sagittal function, semi-cosagittal function, and half cosagittal function are also used. The relationship between different trigonometric functions can be determined by geometrical intuition, or by calculation, and is called trigonometric identities. Trigonometric functions are generally used to calculate the edges of unknown lengths and unknown angles in triangles, and have a wide range of uses in navigation, engineering, and physics. In addition, using trigonometric functions as a template, a similar class of functions can be defined, called hyperbolic functions. The common hyperbolic function is also known as hyperbolic sine function, hyperbolic cosine function, and many more. Trigonometric functions are functions of angles; They are important in studying triangles and modeling periodic phenomena and many other applications. Trigonometric function is usually defined as the ratio of the two sides of a right triangle containing this angle, and can also be equivalently defined as the length of various line segments on a unit circle. More modern definitions express them as infinite series or solutions to specific differential equations, allowing them to extend to arbitrary positive and negative values, even complex values.

As a math teacher at Tenjin High School, Bearded has reached the pinnacle of his comprehension of trigonometric functions, and the attack moves he comprehends from trigonometric functions are extremely sharp and unstoppable.

But Xu Gong in the north of the city was not afraid of these thousands of blades attacking him, and with a gesture of his hand, a huge ink painting scroll appeared behind him, and thousands of galloping horses galloped out of the scroll, like a huge wave, rushing towards the bearded man.

Eighty million horses galloped together, meeting the triangular blades that shot at thousands of gallops.

This trick of Xu Gong in the north of the city is comprehended from ancient famous paintings. It is a painting that has been popular since the Six Dynasties. The painting is of the eight good horses that King Zhou Mu drove for when he visited Kunlun Mountain. The names of the Eight Horses are different in each book. King Jiazhong of the Jin Dynasty recorded: "The name of the eight horses, one is called Jedi, the second is called Turning Feather, the third is called Running to the sky, the fourth is called Yue Ying, the fifth is called Yue Hui, the sixth is called Chaoguang, the seventh is Tengwu, and the eighth is called Wing." It is recorded as: Hualiu, Er, Chiji, Baixi, Quhuang, Yulun, Thief, Shanzi. By the time of Liu Zongyuan, many famous writers and poets suddenly wrote a lot of related poems. The famous ones are Bai Juyizhong, Yuan Zhen's five-character ancient poems, Li Guan's and so on. This literary phenomenon may be related to Tang Dezong's Wangyun Horse. In March of the first year of Yuanxing, due to Li Huaiguang's rebellion, Tang Dezong came to Liangzhou and rebelled against Beijing in July. Regarding this matter, Yuan Zhi said in the preface to the song: "Emperor Dezong was fortunate with eight horses, and seven horses were killed. Li Zhao also talked about this matter, he said Wangyunqiu: "After the old man dies in the flying dragon stable, the noble relatives write it more." It seems that the admiration for the "Eight Horses" at that time, through Dezong's love, has reached a new **.

I saw that tens of millions of galloping horses had broken the blade of the trigonometric function, and they were about to step on the bearded face. But the bearded man was not messy at this time, his hands slashed into the air, and he shouted, "Golden section cut." ”

Divide a line segment into two parts so that the ratio of one part to the total length is equal to the ratio of the other part to this part. The ratio is an irrational number, and the approximate value of the first three digits is 0.618. Because of the beauty of the design in this proportion, it is called the golden section, also known as the middle-to-outside ratio. The golden section was introduced to Europe by the Arabs before and after the Renaissance, and was welcomed by Europeans, who called it the "golden method", and a mathematician in Europe in the 17th century even called it "the most valuable algorithm among all kinds of algorithms". This algorithm is known in India as the "three-rate method" or "three-number rule", which is what we now commonly refer to as the proportional method. In fact, there are also records about the "golden section" in China. Although it is not as early as the ancient Greeks, it was independently created by ancient mathematicians in our country and later introduced to India. Verified The proportional algorithm in Europe originated in China and was introduced to Europe from Arabia through India, not directly from ancient Greece. Because it has aesthetic value in the plastic arts, in the length and width of the arts and crafts and daily necessities design, the use of this ratio can cause people's sense of beauty, and the application in practical life is also very extensive, the ratio of some line segments in the building is scientifically adopted the golden section, the announcer on the stage is not standing in the center of the stage, but on the side of the stage, in order to stand on the golden section point of the stage length of the position is the most beautiful, the sound transmission is the best. Even in the plant kingdom, there is a place where the golden ratio is used, and if you look down from the top of a young tree, you will see that the leaves are arranged according to the golden ratio. In many scientific experiments, a 0.618 method is commonly used in the selection scheme, that is, the optimization method, which can enable us to reasonably arrange a smaller number of tests to find reasonable Western and suitable process conditions. It is precisely because it has a wide and important application in architecture, literature and art, industrial and agricultural production, and scientific experiments that people preciously call it the "golden section".

As the chief math teacher of Tianshen High School, the bearded man did not care about his academic comprehension under Xu Gong in the north of the city, and with this miraculous golden section slash, he cut the galloping horses to the sides at once, and began to disappear to both sides.

"Now you understand! Even if you use the Ancients against me, there is no way to defeat me! In my eyes, I'm just a rubbish sub-teacher! The sub-class teacher should honestly be occupied, and honestly leave the class on time, without any existential value! The bearded man laughed wildly as he raised his hands as a huge ball of light formed in his hands.

"Take my move, the Great Dao Round Ball Attack!" The bearded man threw the huge ball of light in his hand towards Xu Gong in the north of the city.

"A circle is a geometric shape. By definition, a compass is usually used to draw a circle. The diameter and radius length of the inner circle of the same circle are always the same, and the circle has an infinite number of radii and an infinite number of diameters. A circle is an axisymmetric, center-symmetrical figure. The axis of symmetry is the straight line where the diameter is located. At the same time, the circle is a 'positive infinite polygon', and 'infinity' is just a concept. When the polygon has more sides, its shape, circumference, and area are closer to a circle. So, there is no real circle in the world, and the circle is really just a conceptual figure. My orb is immortal, no matter how you defend it, you can't defend or counterattack from any angle! The bearded man said loudly.

Xu Gong in the north of the city couldn't defend himself, and was hit by this huge round ball of light, fell to the ground, and began to vomit blood. But no one sympathized with him, because in Tianshen High School, it was very common for the deputy teacher to not be taken seriously, so even if Xu Gong in the north of the city was beaten by a beard at this time, no one would stand up for him, and the students were even more happy to sit on the mountain and watch the tiger fight.

But just when Xu Gong in the north of the city felt hopeless, a melodious music began to fill the air, and beating notes appeared like elves, flying around Xu Gong in the north of the city.

But in the next second, these beating notes turned into a swarm of black wasps, swooping towards the beard.

A young man in Hanfu holding a guqin appeared in the eyes of everyone, looked at the bearded man coldly, and said: "I thought who was making a big fuss here, he was a worthless high school teacher after a long time, it was shameless." ”

"It turned out to be Mr. Boya in the third year of high school!" When Chengbei Xu Gong saw Boya appear, he immediately shouted: "Teacher Boya, your strength is too strong, come and help me get rid of this shameless person who has been trying to steal my class." ”

Boya sneered and replied, "I've already used the Wild Bee Fly, and I don't think this person can bear it." This piece, often used for solo violin or other instrumental music, was originally an orchestral interlude in Act II, Scene 1 of Rimsky-Korsakov's opera. Today, this orchestral piece has been detached from the original opera. The four-act opera, completed in the 1900s, is based on the Russian god Pushkin. The opera tells the story of King Satan, after he was happy to have his only son, because he was maliciously slandered by a traitor, and put his love and queen in a jar and exiled him to the ocean. Later, the mother and son drifted safely to an isolated island, and the prince finally grew up safely. One day, the prince rescued a swan that had been stung by a bumblebee, but the swan turned into a beautiful and lovely princess. At this time, the innocent father, who understood the queen, also took his attendants and came to this isolated island by boat to find the prince who had been unharmed for a long time. The whole play ends in a happy reunion and joy. ”

Xu Gong in the north of the city was attacked by a large number of wild bees at this time, and then he was caught by these flying bumblebees and attacked with needles, he couldn't stand it anymore, and then he fell to the ground and convulsed.

Boya said to the bearded man at this time: "A garbage high school teacher should not pretend to be forced all day long, and go back as soon as possible." I haven't even tried a lot of strength, and you just fell like this, it's really not interesting at all. ”

After speaking, Boya raised his hand and waved his hand and said to Xu Gong in the north of the city, let me come to the next class, and no one is allowed to rob it.

Chengbei Xu Gong, as an art teacher, and Boya as a music teacher have no intersection on weekdays, but he will not offend Boya as a music teacher, so he said: "Okay, then it's good for you to come to the next class." ”

Then Boya directly grabbed the collar of Chengbei Xu Gong, and directly threw Chengbei Xu Gong out of the classroom, saying: "What I'm talking about is now, you get out of here immediately, so that I can go to class." ”

After throwing all the Chengbei Xu Gong and the bearded math teacher out of the classroom, Teacher Boya put on a smiling look, took out a sheet music, and started the class, saying, "The sheet music we are going to learn today is called." , aka. It is a large-scale qin song in ancient China, a very famous guqin song in the history of Chinese music, and one of the top ten famous guqin songs. That is, in ancient times, the Wei and Jin pianist Ji Kang was known for being good at playing this song, and he was still calm before the execution, Suo Qin played this song, and sighed: "Never now!" There are three important scores that we can see today, the earliest and the most complete, and the version that is often played today. There are 45 sections in total. The whole song is permeated with a kind of indignant and unyielding heroic atmosphere, 'all dressed in splendor, and spears are vertical and horizontal'. Origin: According to records, this song was given by an ancient person when Ji Kang visited Luoxi. And there is a legend of gods and ghosts, which is about Ji Kang's good qin, once, Ji Kang stayed in Yuehua Pavilion at night, couldn't sleep at night, sat up and stroked the qin, the sound of the piano was elegant, and moved a ghost, the ghost was passed on to Ji Kang, and Ji Kang agreed: this song must not teach people. In 263 AD, Ji Kang was killed by Sima Zhao. Before he died, Ji Kangju was not sad, but sighed: 'Yuan Xiaoni tried to learn from this, I Jin Gu is not with me, and it will be impossible now!' ’。 ”

Hearing Mr. Boya talk about the origin of Guanglingsan, many students were moved by Ji Kang's integrity and burst into tears.

For Ji Kang, a historical celebrity, Gao Huan is very impressed.

Ji Kang was the son-in-law of the Cao Wei clan and married Cao Cao's great-granddaughter Changle Pavilion as his wife. The official is a doctor in Zhongsan, known as "Ji Zhongsan". After living in seclusion, he repeatedly refused to be an official. Because he offended Zhong Hui, he was framed by him, and was executed by Sima Zhao at the age of forty. Ji Kang and Ruan Ji and other famous people in the bamboo forest jointly advocated a new style of metaphysics, advocating "the more famous and the more natural", "judging the noble and the lowly and understanding the situation", as the spiritual leader of the "Seven Sages of the Bamboo Forest", Yuan Hong called him one of the "famous people of the bamboo forest". His deeds and experiences have a huge impact on the atmosphere and value orientation of later generations. Ji Kanggong is good at poetry and writing, and his works have a clear style. He pays attention to health and writes. There are heirlooms. His works reflect the ideas of the times and have brought many inspirations to the ideological and literary circles of later generations.

I just don't know if this Mr. Ji Kang's soul has been promoted to godhead after his mortal body dies?

Just when Gao Huan was pondering, a fat foreign teacher pushed the door in, pointed to Boya and said, "What class do you have as a music teacher, get out of here, let me take Xiyi class!" ”

Boya raised his eyebrows and slapped the foreign teacher directly in the face, slapping the foreign teacher into a dissipation and the death of divinity.

"Where's the foreign garbage?" Boya said: "What qualifications do barbarian words have to ascend to the Hall of Elegance, it is simply vulgar and unbearable, and I don't understand why the school has set up such a useless curriculum. ”

Gao Huan deeply agreed with Mr. Boya's words, in his opinion, there is really no need to keep this kind of foreign garbage, as long as it is eliminated on the spot.

But Mr. Boya's class had just finished, and another old man pushed open the door of the classroom and said, "I'm here for class." ”

The new old man seemed to be a little high-level, and even Boya smiled politely, and then let the old man go to class. After the old man came in, it seemed that he wanted to take the test for Gao Huan, so he immediately asked: "Gao Huan, as a physics teacher, I want to ask you a question, is it okay?" ”

Gao Huan glanced at the old man and said, "Teacher, it's okay to talk about it." ”

The old man asked, "I'll just ask a simple question, you can answer the question about the resistor." ”

Gao Huan felt that this question was not difficult, so he replied: "Resistors are generally directly called resistors in daily life. It is a current limiting element, after the resistor is connected to the circuit, the resistance value of the resistor is fixed, generally two pins, which can limit the current through the branch it is connected to. If the resistance value cannot be changed, it is called a fixed resistor. Those with variable resistance are called potentiometers or variable resistors. The ideal resistor is linear, i.e., the instantaneous current through the resistor is proportional to the applied instantaneous voltage. Variable resistors for voltage division. On the exposed resistor, one or two movable metal contacts are pressed tightly. The contact position determines the resistance between either end of the resistor body and the contact. The terminal voltage has a definite function with the current, and the two-terminal device that reflects the ability of electrical energy to be converted into other forms is represented by the letter r in ohms. Actual devices such as light bulbs, heating wires, resistors, etc., can be represented as resistor elements. The resistance value of a resistive element is generally related to temperature, material, length, and cross-sectional area, and the physical quantity that measures the influence of resistance by temperature is the temperature coefficient, which is defined as the percentage of resistance value change when the temperature increases by 1C. The main physical characteristic of the resistor is that it transforms electrical energy into thermal energy, which can also be said to be an energy-dissipating element, and the internal energy is generated when the current passes through it. Resistors usually play the role of voltage division and shunt in circuits. For signals, both AC and DC signals can pass through resistors. ”

Hearing Gao Huan's answer, the class resounded with long-lasting applause and cheers.

So the old man asked Gao Huan again: "Next, you can briefly describe what is a perpetual motion machine." ”

Gao Huan smiled contemptuously, expressed disdain for the old man's temptation, and said: "Perpetual motion machine is a kind of so-called machinery that can continuously move and do work without the need for external input energy, energy or only one heat source. A machine that does not consume energy and can do work forever violates the law of conservation of energy, so it is called "the first type of perpetual motion machine". In the absence of temperature differences, a machine that continuously absorbs heat from seawater or air in nature and continuously transforms it into mechanical energy violates the second law of thermodynamics, so it is called "second type of perpetual motion machine". These two types of perpetual motion machines are concepts that violate the current objective scientific laws and cannot be manufactured. Countless people in history have been obsessed with the design and manufacture of perpetual motion machines, before the establishment of the thermodynamic system, these people have both scientists and speculators who hope to make a fortune by making a fortune, and after the establishment of the thermodynamic system, in addition to the "folk scientists" who want to break the existing scientific system, are committed to the design of the perpetual motion machine, and more are some swindlers who make money in the name of perpetual motion machines. It was not until the 2017 epoch that the existence of the time crystal was confirmed, and its atomic movement does not require any external energy to maintain, which is in line with the "perpetual motion machine" that was previously considered impossible by the physics community, but its energy cannot be utilized until additional energy is added. If the entropy of the time crystal is not high enough, the crystal may scatter into particles, because the latter has a higher entropy, although this may take a long time. ”

The old man smiled with satisfaction, and was very satisfied with Gao Huan's answer.

So the old man asked Gao Huan: "I still lack a boy under my seat, otherwise you will come and be my boy." Good no good? ”

Hearing what the old man said, the students in the classroom were furious. They couldn't tolerate a bad old man having this kind of thought about their idol, and immediately broke out, saying that they would go to break through the sky and ask Gao Huan for justice.

Gao Huan looked at the old man, stopped the students' rampage, and then said to the old man: "Since you asked me so many questions just now, but I also have a question that I don't understand, I want to ask the teacher, I don't know if it's okay?" ”

The old man sneered and replied, "What's wrong with this, teacher, preach and receive karma to solve doubts." If you have any questions, just ask. ”

So Gao Huan asked: "When I was briefly explaining the concept of perpetual motion machine, I came across a word called 'time particle', and I don't know how to explain it, I hope the teacher can explain it." ”