_fcos -- Calculate Cosine

Format

#include <builtin.h>
double _fcos( double x);

Language Level: Extension
_fcos calculates the cosine of x, where >x is expressed in radians. The value of x must be less than 2**63. This function causes the compiler to emit the appropriate 80387 instruction and return only the cosine.

Because it is a built-in function and has no backing code in the library:

Return Value
_fcos returns the cosine expressed in radians.

Example
This example calculates y to be the cosine of x.

#include <builtin.h>
#include <stdio.h>
int main(void)
{
   double x;
   x = 7.2;
   printf("The cosine of %lf is %lf.\n", x, _fcos(x));
   return 0;
   /**************************************************
      The output should be similar to:
      The cosine of 7.200000 is 0.608351.
   **************************************************/
}



cos -- Calculate Cosine
cosh -- Calculate Hyperbolic Cosine
_facos -- Calculate Arccosine
_fcossin -- Calculate Cosine and Sine
_fsincos -- Calculate Sine and Cosine
<builtin.h>