luc026.c (837B)
1 /* Write a program to recieve value of an angle in degreesand check 2 whether sum of squares of sine and cosine of this angle is equal to 1. */ 3 /* Let Us C, Chap- 4, Page - 73, Qn No.: E(d) */ 4 5 #include <stdio.h> 6 #include <math.h> 7 #define EPSILON 0.0000001 8 9 int main() 10 { 11 double angle, result; 12 printf("Enter the angle value in degree : "); 13 // checking if the input is other than number. 14 if(scanf("%lf", &angle) != 1) { 15 printf("\nPlease enter a number."); 16 return 1; 17 } 18 angle = angle * (M_PI / 180); // converting degree to radian 19 result = pow(sin(angle), 2) + pow(cos(angle), 2); 20 (fabs(result - 1.0) < EPSILON) ? 21 printf("\nsum of squares of sine and cosine of this angle is equal to 1.") : 22 printf("\nsum of squares of sine and cosine of this angle is NOT equal to 1."); 23 return 0; 24 }