Opposite over hypotenuse is equal to sine of an angle.

斜边分之对边 的值即是 sin 函数的值。

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

但让我再来说说正弦、余弦和对数函数。

So what's the sine of 30?

sin30°是多少？ 实际上 我写到这里？

What's the sine of 30 degrees?

sin30度等於多少？

This is equal to the sine of theta.

两侧可以同时乘以重力的大小。

This seapower approach to the world became the sine qua non of early American foreign policy.

这种对世界的权方针为早期美国外交政策的必要条件。

So this is going to be equal to the sine of theta.

两侧可以同时乘以重力的大小。

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

我把它画正弦波，就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.

但这个正弦波对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.

我这个正弦扫频信号，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。

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

我要使用正弦 theta， 哦抱歉，正弦 phi。

The man was tired of teaching sine for students.

这人厌倦了为学教授正弦。

The force of gravity parallel equals mass times gravitational field strength  times the sine of the incline angle.

平行重力等于质量乘以重力场强度乘以倾斜角的正弦值。

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

现在对于 Y 方向，我可以使用正弦函数的定义。

For sine, they add to zero.

对于正弦，它加到零。

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

我根本不知道正弦和余弦是什么意思。

Identifying the focal conflict is the sine qua non of brief psychodynamic psychotherapy.

识别焦点冲突是简短心理动力学心理治疗的必要条件。

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

我将使用正弦波移动大量的立方体。

This should start to become a little second nature to you that this is T1 sine of 30, this y component right here.

这应该对你来说很自然这是T1sin30° 这个y分量。