Mr. Bao and his son: Only use Stankang for hair oil

Chapter 37 Pretending to be better in school

It would be inappropriate if Bao Guowei was the only one in the class who didn't copy his homework. Maybe some narrow-minded people would exclude Bao Guowei.

The possibility of this happening is relatively small, but not impossible.

After all, Mr. Shen is in his 50s and [-]s. He has taught as many as [-] students from [-] to [-]. He has never seen anything.

So he stood on the podium, raised his right hand and stretched out two fingers.

"I will give Bao Guowei two questions. If you can answer one of them correctly, the whole class will be exempted from copying half of it. If you can answer both questions, the whole class will be exempted from copying."

As soon as this statement came out, all the students paid full attention.

"The first question is to draw any right triangle and express the sine and cosine tangents of all the angles in it."

This question is a scoring question. As long as you know the three theorems, you will be able to answer it.

"The second question is to draw a table of special values ​​of trigonometric functions in the form of a table. There are a total of twelve special values."

This question is also a score question and relies purely on memory.

Mr. Shen asked two question marks.

Without any pressure, Bao Guowei got up from his seat and left for the podium.

"Bao Guowei, come on! Give our Himalayan team a chance to win!"

Guo Chun gently pushed Bao Guowei's back.

Chen Jinhua looked at Bao Guowei blankly, not knowing what he was thinking.

The distance from the back row to the podium was short, but Bao Guowei walked very slowly.

Because the students on the road were whispering to him.

"Can it be done? Bao Guowei! It's up to you! I really don't want to copy it three hundred times. My hand will be useless after copying it."

This person had a pleading look on his face, and his tone was actually a bit sad.

"You are our hope! If you succeed, I will treat you to stinky tofu."

This person seemed to be very confident and impassioned about Bao Guowei.

"The only hope of the whole class is you!"

Bao Guowei felt numb. Isn't this a bit too tragic? He just went up to write something.

"Baozi, you are so handsome!"

Hearing this, Bao Guowei almost fell down. This was not said by a female student, but by a boy!
Female students in this era are very reserved and would not have the nerve to say such things.

Looking back, I saw a male student who looked like he was easy to bully.He looks smaller in stature and is wearing a black and white suit!
Mr. Shen gave up the podium to Bao Guowei and went to the side to watch Bao Guowei answer questions on the blackboard.

Bao Guowei picked up the chalk, and all the teachers and students paid attention. He first answered the second table question.

The only sounds left in the classroom were breathing, the rustle of chalk on the blackboard, and the thump of knocks. Even the late autumn wind seemed to have stopped and stopped blowing. Even the sound of the leaves rustling outside the window disappeared.

Sine of thirty degrees is one-half, 45 degrees is the root of two, two, sixty degrees is the root of two, three, and ninety degrees is one.

Cosine thirty degrees…

Tangent thirty degrees...

Bao Guowei neatly wrote the twelve special values ​​one by one on the left half of the blackboard, then drew a diagram and marked it with annotations.

Some students opened the first page of "General Catalog of Geometry" and checked whether what Bao Guowei had written on the blackboard was correct, fearing that Bao Guowei had made a mistake.

"It's all right! Just like in the book!"

"The buns are awesome!"

It was the voice of the student who looked easy to bully just now!He seemed to be too excited and shouted softly, but he was shouting in the classroom after all, so everyone heard it.

Although he was standing on the podium, Bao Guowei could vaguely hear the sound of suppressed laughter, but because Mr. Shen was still there, no one could laugh after all.

The chalk in his hand paused for a moment - it was just the first day of school and he was being nicknamed!By the way, this nickname shouldn’t stay with me for a whole school year!
Mr. Shen turned around and glanced at the student, but said nothing. He just watched Bao Guowei finish the second question attentively.

The first question is a scoring question that is as basic as it gets. To list a table, you need to use your brain to think about the layout. This one can be easily deduced by knowing the definition.

Bao Guowei drew three classic right triangles whose side lengths are in the ratio of one to the root of three to two.

The ratio of one to the root is three to two. It can be inferred from the value of the special trigonometric function that it is actually a right triangle with three angles of thirty degrees, sixty degrees and ninety degrees respectively.

Bao Guowei marked the three angles with three segments ABC and marked the length of the line segments.

Angle A is set to thirty degrees, angle B is set to sixty degrees, and angle C is set to a right angle.

Then the sine of angle A is BC to AB, a ratio of two to one.

The cosine of angle A is CA to AB, the root of three to two.

The tangent of angle A is BC to AC. The ratio is one to the root of three, which simplifies to one-third root of three.

In the same way, angle B and angle C can be obtained.

……

Bao Guowei stopped writing. This was an over-answered question. Not only did he express the sine, cosine, and tangent of each angle, but he also listed their values.

Although the strokes of the pen can't scare the wind and rain, or weep the ghosts and gods, the long string of neat chalk words that fill half the blackboard, coupled with the fairly pleasing layout, is still a bit intimidating.

At least it's easy to scare the students in the class who don't understand anything at the moment.

"Not bad, there is nothing wrong with the writing."

Mr. Shen nodded.

Hearing this, the students in the whole class were very excited.

"Baozi! Saint Bao! A role model for our generation!"

"That's awesome! You can write so many things correctly!"

"I just read the book. These things don't seem to be difficult. They just need to be memorized."

One student said to himself, which immediately aroused public outrage.

"Let your mother go..."

"You can do it! Come on! Just now the teacher asked you a question. Why didn't you say anything for a long time? Now you're talking nonsense!"

"If you don't think it's difficult, just copy it three hundred times. Why didn't you say anything when the teacher just asked a question?"

Bao Guowei completed Mr. Shen's task and was exempted from copying three hundred times. The students were in a good mood and naturally they would not get used to these people who forget their mothers after eating.

The man lowered his head after being sprayed, his face turned red, and he stopped talking.

"Okay! Everyone calm down! Look at what's written on the blackboard. First memorize the definition of string, which can be understood by combining it with the picture drawn by classmate Bao Guowei, and then memorize the table of special values! I will check three theorems tomorrow. , Randomly check the special value table the day after tomorrow, if there is any problem, do it [-] times!"

Bao Guowei completed his task and returned to his seat. Guo Chun poked Bao Guowei with his finger.

"Bao Guowei, great job! I will make you the vice-captain of my Himalayan basketball team! I appreciate it."

"Don't even talk! That guy named Guo Chun! Shut your mouth!"

……

After nearly an hour, the bell rang for the end of get out of class.

It was only about four o'clock in the afternoon, but it got dark early in late autumn, and it was already a little dark outside the window, and there were even the sounds of insects chirping.

"Okay, day students can get out of school after finishing this class. Gusu City has not been very peaceful recently. The school recommends that day students go home early and not linger on the streets."

After saying this, Mr. Shen left immediately without delaying the meeting for a second.

(End of this chapter)