I get it! Sin is opposite hypotenuse... Yes.

懂了，正弦是边比斜边。是的。

But let me go back to these sines, cosines and logarithms.

但让再来说说正弦、余弦和。

I actually write it with these little ridges in it, so SOH... CAH... TOA.

写的时候会写成这种三角的形状，这是正弦，余弦，正切。

We draw them as sine waves, as if something's going back and forth or up and down.

把它画成正弦波，好像有东西在前后或上下运动。

But that sine wave is just gonna be a tremendous load on all the health care providers.

但这个正弦波所有医务工作者来说都是巨大的工作量。

So we generate this swept sine wave and we use that to capture the acoustic of the cave.

成这个正弦扫频信号，然后利用它来测定洞穴的声音特性。

So each of the x sine in the sample.

所以样本中的每个x正弦。

Here is a pure 261 hertz sine wave.

这是一个纯净的261赫兹正弦波。

And a pure 263 Hertz sine wave.

还有一个纯263赫兹的正弦波。

Likewise sine of 180 is going to be 0.

同样，180度的正弦值也是0。

I'm gonna use sine of theta, oh sorry, sine of phi.

要使用正弦 theta， 哦抱歉，正弦 phi。

And now for the Y direction we can use the definition of sine of theta.

现在于 Y 方向，可以使用正弦的定义。

There are others, sine, cosine, add, subtract.

还有其他的，如正弦、余弦、加法、减法。

So, sine x over x function, sinc function.

所以，正弦x除以x，sinc。

It's going to be some pure tones, which is like a sine wave.

测试将使用纯音，类似于正弦波。

It's all just trigonometry, connecting sides and angles through sines and cosines.

这是三角学，上边 以及跨正弦和余弦的角度。

You should learn how to use the sine bar .

你应该学习如何使用正弦规。

We're picking up our old ECS example project, the sine wave of cubes.

正在使用旧的 ECS 示例项目，立方体的正弦波。

I don't have the slightest idea what sine and cosine mean.

根本不知道正弦和余弦是什么意思。

But the sine makes sense to me and it should make sense to you as well.

但正弦来说是有意义的，你也应该有意义。