Program to illustrate trigonometric function

#include<stdio.h>
#include<conio.h>
#include<math.h>
void main()
{
    int n; 
    float f;
    clrscr();
    printf(" enter angle in degree \n"); 
    scanf("%d",&n);
    f=n*22.0/7.0/180;         /* converting angle to radians */
    printf("\n angle =%5d\n sin(%d) =%f\n cos(%d) = %f\n tan(%d) =%f",
                 n,n,sin(f),n,cos(f),n,tan (f));
    getch();
{
    Output:
    enter angle in degree
    30
    angle = 30
    sin(30) = 0.500183
    cos(30) = 0.865920
    tan(30) = 0.577631