Syntax

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

cos calculates the cosine of x. The value x is expressed in radians. If x is too large, a partial loss of significance in the result may occur.

cos returns the cosine of x.

This example calculates y to be the cosine of x.

#include <math.h>

int main(void)
{
   double x,y;

   x = 7.2;
   y = cos(x);
   printf("cos( %lf ) = %lf\n", x, y);
   return 0;

   /****************************************************************************
      The output should be:

      cos( 7.200000 ) = 0.608351
   ****************************************************************************/
}

• acos
  
• cosh
  
• sin
  
• sinh
  
• tan
  
• tanh

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