你知道这仅仅是正弦,余弦和正切的。
And you know this is just what sine, cosine, and tangent are.
例如,清单3展示了一个样式表,它生成角度的正弦、余弦和正切值。
For example, Listing 3 shows a stylesheet that generates sines, cosines, and tangents for the angles.
双曲正弦、双曲余弦和双曲正切函数也会以常见或特殊形式出现在各种计算中。
The sinh, cosh, and tanh functions also all appear in various calculations in special and general relativity.
Then you're supposed to know derivatives of simple functions like sines and cosines.
你应该知道一些简单函数的导数,比如正弦函数和余弦函数
sine and cosine are definite numbers.
正弦和余弦都是有限大小的数
But since sine square plus cosine square is 1, you'll find this vector has a fixed length R.
但是由于正弦和余弦的平方和为1,你会发现这个矢量模长恒等于 R
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