tan example in C

Header file:

    math.h

Synopsis:

     double tan(double x);

Description:

     Returns tangent value of x.

tan function in C example:

  #include<stdio.h>
  #include<math.h>
  int main() {
        /*
         * degree to radian conversion
         * radian = degree * PI/180;
         */
        double deg, radian;
        printf("Enter your input:");
        scanf("%lf", &deg);
        deg = deg * (3.14 / 180);
        radian = tan(deg);
        printf("Result: %lf\n", radian);
        return 0;
  }

  Output:

  jp@jp-VirtualBox:~/cpgms/math$ gcc tan.c -lm
  jp@jp-VirtualBox:~/cpgms/math$ ./a.out
  Enter your input:45
  Result: 0.999204