余弦的
双语例句原声例句
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我们还可以通过解出式中余弦的方法，得到两向量间的角度。
And, we can use that to measure angles between vectors by solving for cosine in this.
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其多项式系数又表示为入射角的余弦的另一个羃级数。
The polynomial coefficients are expressed as another power series of cosine of incident angle.
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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
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sine and cosine are definite numbers.
正弦和余弦都是有限大小的数
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I'm using the fact that when you take a cosine and change the angle inside the cosine, it doesn't care. whereas, if you go to the sine and change the angle inside the sine, it becomes minus sine.
我用了一个结论,当你使用余弦函数时,改变角度的正负,函数值不变,而对于正弦函数,改变角度的符号,则函数值也会变号
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