c++ acos函数

c++ acos函数

acos() function is a library function of cmath header, it is used to find the principal value of the arc cosine of the given number, it accepts a number (x) and returns the principal value of the arc cosine of x in radians.

ACOS()函数是CMATH报头的库函数，它被用于查找给定数的反余弦的主值，它接受一个数字(x)和返回x的以弧度为单位的反余弦的主要值。

Note: Value (x) must be between -1 to +1, else it will return a domain error (nan).

注意：值( x )必须介于-1到+1之间，否则它将返回域错误( nan )。

Syntax of acos() function:

aco