#include <stdio.h>
#include <math.h>
/*
This function receives an angle in radians and computes both sine and cosine.
Returning the results through pointer parameters keeps the interface simple
and avoids unnecessary structures. This is a common and efficient pattern in C.
*/
void compute_sin_cos(double radians, double *out_sin, double *out_cos) {
/* Use the standard math library's trigonometric functions.
These are optimized and provide correct results across platforms. */
*out_sin = sin(radians);
*out_cos = cos(radians);
}
int main(void) {
double degrees = 60.0;
/* Convert degrees to radians using the standard formula.
M_PI is provided by <math.h> on many systems; if not, define your own. */
double radians = degrees * (M_PI / 180.0);
double s, c;
/* Compute both sine and cosine using our helper function. */
compute_sin_cos(radians, &s, &c);
/* Display the results. */
printf("Angle: %.1f degrees\n", degrees);
printf("Radians: %.6f\n", radians);
printf("sin: %.6f\n", s);
printf("cos: %.6f\n", c);
return 0;
}
/*
run:
Angle: 60.0 degrees
Radians: 1.047198
sin: 0.866025
cos: 0.500000
*/
