Returns the cosine of its radian argument.

    Format

      #include  <math.h>

      double cos  (double x);

      float cosf  (float x); (Integrity servers, Alpha)

      long double cosl  (long double x); (Integrity servers, Alpha)

      double cosd  (double x); (Integrity servers, Alpha)

      float cosdf  (float x); (Integrity servers, Alpha)

      long double cosdl  (long double x); (Integrity servers, Alpha)