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Manual Reference Pages  - COS (3)

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cos, cosf, cosl - cosine function

CONTENTS

Synopsis
Description

#include <math.h> 



double cos(double x); 



float cosf(float x); 



long double cosl(long double x); 

The cos() function returns the cosine of x, where x is given in radians.

The cos() function returns a value between -1 and 1.

SVID 3, POSIX, BSD 4.3, ISO 9899. The float and the long double variants are C99 requirements.

acos(3), asin(3), atan(3), atan2(3), sin(3), tan(3)

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