C Tutorial/math.h/cos

cos

Item Value Header file math.h Declaration float cosf(float arg);double cos(double arg);long double cosl(long double arg); Function returns the cosine of arg. Parameter arg must be in radians.

<source lang="cpp">#include <math.h>

 #include <stdio.h>
 int main(void)
 {
   double val = -1.0;
   do {
     printf("Cosine of %f is %f.\n", val, cos(val));
     val += 0.1;
   } while(val<=1.0);
   return 0;
 }</source>