Teacher Xu, Please Take Care of the Reckless Students in Your Class

"call……"

Zhang Ruiyun held his breath, slowly approached Wei Minghai, slowly lowered his head, and took a closer look...

"Sleeping..."

"Hi! I'm sorry! I'm sorry... I hope I didn't bother you!"

Although he was mentally prepared, he almost couldn't help but swear.

Because in these ten minutes, Wei Minghai has already solved the multiple-choice questions and fill-in-the-blank questions, and is doing the proof questions!

Not only that, his acting is dazzling and white!

"hiss……"

Although Zhang Ruiyun restrained himself, he couldn't help it at all. He trembled all over without saying a word, and repeatedly gasped!

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42 Is it super classy?I don't feel it! [6 more!Ask for a collection of flower evaluation tickets]

If this papyrus can be personified, it must have left Wei Minghai in despair.

It felt the greatest humiliation of its life!

As a piece of grass paper, it is not used by anyone!

Zhang Ruiyun stared at Wei Minghai, the corners of his eyes twitching.

Wei Minghai completely entered the state, his thoughts kept on, and the pen did not stop.

If the fill-in-the-blank question doesn't need to be played on the paper and can barely be said, then the answer to the following question is no longer needed, it's really too much!

Question: In △ABC, sin^2A-sin^2B-sin^2C=sinBsinC.

(1) Seek A;

(2) If BC=3, find the maximum value of the perimeter of △ABC.

Zhang Ruiyun didn't dare to blink, he was afraid of missing any details.

He decided that Wei Minghai would definitely use the acting papyrus!

This question, no matter what, requires the use of parchment paper!

Zhang Ruiyun narrowed his eyes slightly, he was very sure of his own judgment.

Can--

Wei Minghai was stunned for about half a minute, and then started writing.

He didn't even look at the playing paper next to him, and immediately wrote:

Solution: (1) A=2π/3

(2) The maximum perimeter of △ABC is 3=2+3 under the square root.

(The second question has two problem-solving ideas, one sine theorem and two cosine theorem)

In Wei Minghai's view, what can give the answer directly is simply too simple!

So he simply skipped the process!

Even if he wanted to use a different way of solving the problem to give the answer, but this question is really unworthy!

Zhang Ruiyun, "!!!"

At this moment, Zhang Ruiyun didn't know how to express what he saw!

This question examines the application of the sine theorem and cosine theorem of triangles, as well as the identity transformation, images and properties of trigonometric functions.

Although the problem is not the most difficult, but it is also a mid-range problem!

But Wei Minghai gave the answer directly, and disdainfully gave two directions for solving the problem!

Not to mention ordinary people, even the real math gods are not like this!

Too embarrassing!

Also, it's incredible!

This kind of question is obviously a mid-range answer, but it was calculated by Wei Minghai's brain abruptly.

Even Zhang Ruiyun was saddened by this question.

Don't people want to be embarrassed about this question?

If the teacher who asked the question knew that you gave the answer within a minute, wouldn't it be depressing to jump off the building!

Zhang Ruiyun's eyes subconsciously shifted to the dazzling performance paper next to him.

"Hey……"

He doesn't want to watch Wei Minghai write questions anymore, it's too shocking!

Looking at the other 30 classmates, fortunately, these people are not as terrifying as Wei Minghai, but their speed is not slow.