sinα?cosβ+cosα?sinβ

cosα+β=cosα?cosβ-sinα?sinβ

tanα+β=tanα+tanβ/1-tanα?tanβ

sinα-β=sinα?cosβ-cosα?sinβ

cosα-β=cosα?cosβ+sinα?sinβ

tanα-β=tanα-tanβ/1+tanα?tanβ

As you e across a right triangle you fell easy to solve

当你遇到直角三角形很容易解

But an obtuse triange gonna make you feel confused

但钝角三角形使你感到困惑

Don't worry about what you do

无须担心

There are always means to solve

总有解决方法

As long as you master the sine cosine law

只要你掌握了正余弦定理

At this moment I've got nothing to say

此刻我无以言表

As trig-functions rain down upon me

当时三角函数犹雨点般落向我

At this moment I've got nothing to say

此刻我无以言表

Let's sing a song about trig-functions

让我们唱起三角函数歌谣吧

Long live the trigonometric functions

三角函数万岁

娇娇唱三角函数属于看着字幕也不知道到哪的那种

韩文：神秘的girl（中文版）

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请为我的驻足留下位置

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你就像吹来的凉爽的风

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