cosf


Cosine

[Classification]

Mathematical library

[Syntax]

#include <mathf.h>

float cosf(float x);

[Return value]

Returns the cosine of x.

If inputting +, cosf returns a Not a Nuber(NaN) and sets macro EDOM to global variable errno.

[Description]

This function calculates the cosine of x. Specify the angle in radian.