cos

Name

cos, cosf, cosl,
- cosine function

Library

libm.lib

Synopsis

#include <math.h>

double cos (double x);

float cosf (float x);

long double cos (long double x);

Return values

The cos, cosf, and cosl functions return the cosine value.

Detailed description

The cos and cosf functions compute the cosine of x (measured in radians). A large magnitude argument may yield a result with little or no significance. The function cosl is an alias to the function cos.

Examples

#include <math.h>
int main( void )
{
   double pi = 3.1415926535;
   double x, y;
   x = pi / 2;
   y = cos( x );
   printf( "cos( %f ) = %f\n", x, y );
   y = cosf( x );
   printf( "cosf( %f ) = %f\n",x, y );
   y = cosl( x );
   printf( "cosl( %f ) = %f\n",x, y );
}

Output

cos ( 1.570796 ) = 0.000000
cosf( 1.570796 ) = 0.000000
cosl( 1.570796 ) = 0.000000

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