polar to rectangular form conversion

/*gowrikausalya.blogspot.com*/
/*c-program to convert polar form to rectangular form*/
#include<stdio.h>
#include<math.h>/*to use sqrt,atan(tan inverse),cos,sin,etc*/
#include<conio.h>
#define pi 3.1415927/*use preprocessor to set value for pi as 3.14..*/
int main()
{
    double rp,ip,mag,ang;
    printf("enter the magnitude :\t");
    scanf("%lf",&mag);
    printf("\nenter the angle : \t");
    scanf("%lf",ang);
    rp= (mag * (cos ( (ang * pi) / 180) ) );
    ip= (mag * (sin ( (ang * pi) / 180) ) );
    printf("\n\n Real part is %.3lf",rp);
    printf("\nImaginery part is %.3lf",ip);
    getch();
}

output:-

enter the magnitude :   12

enter the angle :       90

 Real part is 12.000

Imaginery part is 0.000

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