C - Convert Degrees to Radians

Introduction

What's a radian?

A radian is a measurement of a circle, or, specifically, an arc.

It uses the value pi instead of degrees. Instead of a circle having 360 degrees, it has 2pi radians.

One radian equals 57.2957795 degrees, and one degree equals 0.01745329 radians.

Demo

#include <stdio.h> 

int main() /*w  w w. ja v  a2 s .  c  om*/
{ 
   float degrees,radians; 

   printf("Enter an angle in degrees: "); 
   scanf("%f",&degrees); 
   radians = 0.0174532925*degrees; 
   printf("%.2f degrees is %.2f radians.\n",  
              degrees,radians); 
   return(0); 
}

Result

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