cos

NAME

cos, cosf, cosl - cosine function

#include <math.h>
 I double cos(double  x );

I float cosf(float  x );

I long double cosl(long double  x );

Link with -lm.

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

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

SVr4, 4.3BSD, C99. The float and long double variants are C99 requirements.