Question

How to use cacos() to computes complex arc cosine in C

Answer 1

#include <stdio.h>
#include <math.h>
#include <complex.h>

int main(void)
{
    double complex n = cacos(-2);
    
    printf("cacos(-2+0i) = %f%+fi\n", creal(n), cimag(n));
    printf("cacos(-2+0i) = %f + i%f\n", creal(n), cimag(n));
   
    return 0;
}
  
/*
run:
 
cacos(-2+0i) = 3.141593-1.316958i
cacos(-2+0i) = 3.141593 + i-1.316958

*/

 

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