第49章 参加活动的一家三口(第2/3 页)

cos（π/2－α）=sinα

tan（π/2+α）=－cotα

tan（π/2－α）=cotα

That is to say the odds will change, evens are conserved

The notations that they get depend on where they are

But no matter where you are

I've gotta say that

If you were my sine curve, I'd be your cosine curve

I'll be your derivative, you'll be my negative one

As you change you amplitude, I change my phase

We can oscillate freely in the external space

As we change our period and costant at hand

We travel from the origin to infinity

It's you sine, and you cosine

Who make charming music around the world

It's you tangent, cotangent

Who proclaim the true meaning of centrosymmetry

No B BOX

南娇娇：还有一段啊，大家忍耐一下。

You wanna measure width of a river, height of a tower

You scratch your head which cost you more than an hour

You don't need to ask any "g

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