Three different trig ratios, sin, cos, and tan.

三种三角函数，正，，正切。

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

但让我们再来说说正、和对数函数。

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

我懂了，正是对边比斜边。是的。

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

我写的时候会写成这种三角的形状，这是正，，正切。

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

我们它们画成正波，就好像有东西在前后或上下运动。

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

我们生成这个正扫频信号，然后利用它来测定洞穴的声音特性。

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

但这个正波对所有务工作者来说都是巨大的工作量。

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

我要使用正 theta， 哦抱歉，正 phi。

So each of the x sine in the sample.

所以样本中的每个 x 正。

The man was tired of teaching sine for students.

这人厌倦了为学生教授正。

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

现在对于 Y 方向，我们可以使用正函数的定义。

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

我根本不知道正和是什么意思。

We're going to be moving our mass of cubes using a sine wave.

我们将使用正波移动大量的立方体。

For sine, they add to zero.

对于正，它们加到零。

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

我们正在使用旧的 ECS 示例项目，立方体的正波。

The sine squared function always reduces to one half when averaged.

正平方函数 在平均时总是减少到一半。

OK, so here's our wave system that we created to move a set of cubes in a sinusoidal pattern.

好的，这是我们创建的波系统，用于以正模式移动一组立方体。

The force required to lift is reduced by the sine of the angle of the stairs, call it 30 degrees, so, about half.

运上去所需的力度按梯角的正值减少，30度角的话就减少一半力气。

" Possibilities! " The thought hung like a sine wave in Leto's mind: Paul and Jessica haveescaped!

“可能性！”这个想法像正波一样悬在雷托的脑海里：保罗和杰西卡逃脱了！

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

这是三角学，上边 以及跨正和的角度。