catanf, catan, catanl

 

C

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Numerics

Common mathematical functions

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Complex number arithmetics

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Type-generic math

 

Complex number arithmetic

Types and the imaginary constant
complex Complex_I CMPLX	imaginary Imaginary_I I
Manipulation
cimag creal carg	conj cproj
Power and exponential functions
cexp clog	cpow csqrt
Trigonometric functions
ccos csin ctan	cacos casin catan
Hyperbolic functions
ccosh csinh ctanh	cacosh casinh catanh

 

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.

Parameters

z

-

complex argument

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.

Example

Run this code

#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

See also

casincasinfcasinl (C99)(C99)(C99)	computes the complex arc sine (function)
cacoscacosfcacosl (C99)(C99)(C99)	computes the complex arc cosine (function)
ctanctanfctanl (C99)(C99)(C99)	computes the complex tangent (function)
atanatanfatanl (C99)(C99)	computes arc tangent (arctan(x)) (function)
C++ documentation for atan