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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