Question

How to use sin() function to get the sine of an angle of N radians in C

Answer 1

#include <stdio.h>     
#include <math.h>
 
#define PI 3.14159265
 
int main(int argc, char **argv)
{   
	printf("sin(PI / 6) = %f\n", sin(PI / 6));
    printf("sin(PI / 2) = %f\n", sin(PI / 2));
	printf("sin(PI / 180) = %f\n", sin(PI / 180));
    printf("sin(-2 * PI / 4) = %f\n", sin(-2 * PI / 4));
    printf("sin(+0) = %f\n", sin(0.0));
    printf("sin(-0) = %f\n", sin(-0.0));
    printf("sin(+1) = %f\n", sin(1.0));
    printf("sin(-1) = %f\n", sin(-1.0));
  
    return 0;
}
 
/*
run:
   
sin(PI / 6) = 0.500000
sin(PI / 2) = 1.000000
sin(PI / 180) = 0.017452
sin(-2 * PI / 4) = -1.000000
sin(+0) = 0.000000
sin(-0) = -0.000000
sin(+1) = 0.841471
sin(-1) = -0.841471

*/

 

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