Chapter 1280： ：R=a(一-sinθ), the most beautiful in the world...

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"There are many people who say that mathematics is a boring subject, saying that it is boring. Some people say that learning mathematics is a person who does not understand romance. Well, here, I want to prove it to all the male gods who study mathematics. , I definitely wronged them." Uh, well, I didn't expect that when Lu Ning changed his conversation, he even talked about this aspect. This time, it aroused everyone's curiosity.

Even the principal of Jiaotong University was a little surprised, thinking that Lu Ning might say how to prove the "Generalized Riemann Conjecture", or talk about the study of mathematics, but he did not expect that Lu Ning would use this kind of perspective to talk about mathematics. To be honest, the men in science and engineering in various universities are not very popular with girls. After all, they are the representatives of straight men, and in trendy terms, they are all boring men.

The science and engineering men sitting below were a little excited. Is Lu Ning trying to clean them up? Well, one by one, with the reputation of being a straight man with four eyes, those girls would rather go to the liberal arts to find those men in the liberal arts than to find the boys in their own subjects.

"Some people may say that I am forcibly whitewashing. Well, I have an example. In this way, I will announce a number to you first, and then I will tell a story." Lu Ning was on the whiteboard behind him. Above, I wrote a formula: r=a(1-sinθ), a simple formula, not to mention liberal arts students, even some students who study mathematics do not know what this means for a while? For a time, there was a lot of discussion below.

"Everyone, you can try and draw the graph of this equation." Well, the mathematics majors below have already begun to solve the equation. This equation graph is not difficult, but those who have got the equation graph exclaimed. Aloud, my goodness, it's incredible, it turned out to be in the shape of a heart, my goodness, it turns out that mathematical equations can do this too?

"I said, do you know the equation r=a(1-sinθ)?" The president of Jiaotong University asked a mathematics professor standing next to him, with some incredible expressions on his face. Lu Ning is really, good. Well, I didn't expect that this kind of operation would still happen, Tianxiu, could it be that he created it himself?

"R=a(1-sinθ), an uncomplicated equation, but, to be honest, I haven't really touched it." The mathematics professor shook his head and seemed to have learned for the first time, well, maybe, Lu Ning is right. Mathematics is not only a rigorous subject, but also so romantic. It seems that I used to only focus on academic research, and indeed forgot the charm of mathematics.

"Everyone, when I see your expressions, I know that you have solved the graph of this equation. This is the famous "heart-shaped line". Well, it seems that you are very ignorant. Abroad, a boy from the Department of Mathematics. In love letters, people usually express their love in a shy manner, and the formula r=a(1-sinθ) is a good way of expression."

At this moment, Lu Ning had already drawn the graph of this equation on the whiteboard behind him. This allowed more people to see that the coordinate graph was in the shape of a heart, which also made everyone present stare. This is really romantic, isn't it?

You know, this is not an ordinary flat heart, it is a three-dimensional heart shape, and it is perfect.

"Well, everyone, you have already seen the graph of the equation of r=a(1-sinθ), then, next is the story." Lu Ning glanced at the dark people underneath. At this moment, everyone All eyes were on Lu Ning's body.

"The story takes place in a French aristocratic family in 1596. Descartes’ father was a member of the parliament, and his social status was relatively high. Therefore, the young Descartes hardly had any troubles. Of course, if you have to say the young Descartes If there is any problem, it is that he has been weak since he was a child, and his physique is not very strong."

With the beginning of the story, Lu Ning's magnetic voice directly brought everyone into his own story. It can be seen that Lu Ning is a very good storyteller and can attract everyone to listen.

"When Descartes was in his fifties, the terrible Black Death broke out on the European continent. Descartes was forced to wander to Sweden and became the mathematics teacher of Princess Christine of Sweden. They got along with each other day by day, which made them love each other. At that time, the little princess was only 18 years old. After the king knew their feelings, he was furious and ordered Descartes to be executed. Later, because of the princess’s plea, he was exiled to France, and Christine The princess was also put under house arrest by her father."

Well, a classic love story, not to mention others, just involves nobles and princesses, cross-age love, these are all gimmicks, which aroused the interest of everyone to continue listening.

"Well, this kind of love story cannot have a perfect ending like Disney's. After Descartes returned to France, he became seriously ill. He sent letters to the princess every day, but they were all intercepted by the king mercilessly. After coming down, Christine has never received any news from Descartes." In that era, when he got the Black Death, that was the end of death.

You know, the Black Death at that time killed one-third of the population of the Europa continent, a turbulent era.

"After the thirteenth letter sent to Princess Christine, Descartes died in anger. This final farewell letter has no words, only a short formula: r=a(1-sinθ) "When talking about this, Lu Ning sighed.

The listeners below are also a little sad. Yes, I thought it was a romantic love story, but I didn't expect it to end in tragedy. However, in this way, it can become a classic. Well, just like Romeo and Juliet, tragedy can become a classic.

However, in any case, the formula r=a(1-sinθ) has indeed become an eternal classic. At least, at this moment, this formula has spread from Lu Ning’s mouth, and it can even spread throughout the whole in a short period of time. Hua Guo, needless to say, at this moment, the campus network of Jiaotong University has been uploaded by several students of this equation and this beautiful and miserable story.

"I really didn't expect that Lu Ning would tell a story like this." The principal also sighed. Before he knew it, Lu Ning brought him into it.

"That's not a better proof of the romance of mathematics, does it? The principal?" The professor of the mathematics department also looked admiringly. Well, such a teacher may be what all students expect, but it's a pity. Lu Ning will never be a teacher.

It seems that it is time for me to change my way of teaching. Many professors are self-reflection.

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