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Subroutines
Browse in : All > Documents > Man Pages > Subroutines (8513)

NAME

cos, cosf, cosl - cosine function  

SYNOPSIS

#include <math.h> double cos(double x); float cosf(float x); long double cosl(long double x);

 

DESCRIPTION

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

RETURN VALUE

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

CONFORMING TO

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

SEE ALSO

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