Question

How to calculate inverse tangent of a number in C

Answer 1

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

int main(void) {
    printf("%lf\n", atan(0.4));

    printf("%lf\n", atan(-0.4));

	return 0;
}




/*
run:

0.380506
-0.380506

*/

 

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