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catanf, catan, catanl

From cppreference.com
< c‎ | numeric‎ | complex
Defined in header <complex.h>
float complex       catanf( float complex z );
(since C99)
double complex      catan( double complex z );
(since C99)
long double complex catanl( long double complex z );
(since C99)

Computes the complex arc tangent of z with branch cuts outside the interval [−i,+i] along the real axis.

Contents

[edit] Parameters

z - complex argument

[edit] Return value

The complex arc tangent of z in the interval (−∞; ∞) along the imaginary axis and in the interval [−π/2; +π/2] along the real axis.

[edit] Example

#include <stdio.h>
#include <complex.h>
 
int main(void)
{
    double complex z;
 
    z = ctan(1.0+2.0*I);
    printf("ctan(1.0+2.0i)            ==> %f%+fi\n", creal(z),cimag(z));
 
    z = catan(0.033813+1.014794*I);
    printf("catan(0.033813+1.014794i) ==> %f%+fi\n", creal(z),cimag(z));
 
    return 0;
}

Output:

ctan(1.0+2.0i)            ==> 0.033813+1.014794i
catan(0.033813+1.014794i) ==> 1.000004+1.999996i

[edit] See also

(C99)(C99)(C99)
computes the complex arc sine
(function) [edit]
(C99)(C99)(C99)
computes the complex arc cosine
(function) [edit]
(C99)(C99)(C99)
computes the complex tangent
(function) [edit]
(C99)(C99)
computes arc tangent (arctan(x))
(function) [edit]