arccosine 反余弦
- Returns the arccosine of a number.
返回数字的反余弦值。 - The inverse function of that restricted cosine function is called the arccosine function.
被限定的余弦函数之反函数叫做反余弦函数。 - The acos() function returns the arccosine of a number as a numeric value value between 0 and PI radians.
函数的作用是:返回一个大小位于0到PI之间的反余弦值。
arccosine[ noun ]
the inverse function of the cosine; the angle that has a cosine equal to a given number
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