cos (math function) in C. C Programming,C Programs,Math functions in C,math.h 01 #include <stdio.h>02 #include <math.h>03 04 int main()05 {06 double result;07 double x = 0.5;08 09 result = cos(x);10 printf("The cosine of %lf is %lfn", x, result);11 12 return 0;13 } OUTPUT : The cosine() of 0.500000 is 0.877583