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Home > Electronics Tutorials > C Language Tutorial > math.h - Trigonometry functions - acos

C Language Programming Library Reference Guide

math.h - Trigonometry functions - acos

Declaration:

double 
																acos(double

x);

Returns the arc cosine of x in radians.

Range:

The value x must be within the range of -1 to +1 (inclusive). The returned value is in the range of 0 to pi (inclusive).

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