Open System Services Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

catanf(3) OSS Library Calls Reference Manual
NAME
catanf - Computes the float complex arc tangent
LIBRARY
H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL
32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll
64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll
SYNOPSIS
#include <complex.h>
float complex catanf(
float complex z);
PARAMETERS
z Specifies a float complex value.
DESCRIPTION
The catanf( ) function is a float complex version of the catan() function; it takes a float complex
argument and returns a float complex result.
The catanf( ) function computes the complex arc tangent of z, with branch cuts outside the inter-
val [-i, +i] along the imaginary axis.
NOTES
This function is implemented only for the IEEE_float floating-point option. Applications using
this function cannot be compiled if the specified floating-point option is Tandem_float.
RETURN VALUES
The catanf( ) function returns the complex arc tangent of z in the range of a strip mathematically
unbound along the imaginary axis and in the interval [-π/2, +π/2] along the real axis.
ERRORS
No errors are defined.
RELATED INFORMATION
Functions: atan(3), catan(3), catanl(3), ctan(3).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
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