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网络繁忙
Grammar
COS(number)
Returns the cosine of an angle.
Parameter
number
The angle in radians you want the cosine of.
The function supports only one numerical parameter and returns illegal if more than one numerical parameters are set.
To express the returned angle in radians, multiply the result by PI()/180. COS(n*2*PI()+number)=COS(number) (n is an integer and the number is from - pi to pi).
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