catan(3M) Mathematical Library Functions catan(3M)NAME
catan, catanf, catanl - complex arc tangent functions
SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <complex.h>
double complex catan(double complex z);
float complex catanf(float complex z);
long double complex catanl(long double complex z);
DESCRIPTION
These functions compute the complex arc tangent of z, with branch cuts outside the interval [ -i, +++++pipii ] along the imaginary axis.
RETURN VALUES
These functions return the complex arc tangent value, in the range of a strip mathematically unbounded along the imaginary axis and in the
interval [ -pi/2, +pi/2 ] along the real axis.
ERRORS
No errors are defined.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO complex.h(3HEAD), ctan(3M), attributes(5), standards(5)SunOS 5.11 12 Jul 2006 catan(3M)
Check Out this Related Man Page
CASIN(3) BSD Library Functions Manual CASIN(3)NAME
casin -- complex inverse sine function
catan -- complex inverse tangent function
SYNOPSIS
#include <complex.h>
double complex
casin(double complex z);
long double complex
casinl(long double complex z);
float complex
casinf(float complex z);
double complex
catan(double complex z);
long double complex
catanl(long double complex z);
float complex
catanf(float complex z);
DESCRIPTION
casin(z) computes the inverse sine of the complex floating-point number z, with branch cuts outside the interval [-1, 1] on the real axis.
ctan(z) computes the inverse tangent of the complex floating-point number z, with branch cuts outside the interval [-i, i] on the imaginary
axis.
Both functions return values in a strip of the complex plane with unbounded imaginary part, and real part in the interval [-Pi/2, Pi/2].
NOTES
casin and catan are defined in terms of the complex inverse hyperbolic functions as follows:
casin(z) = -i * casinh(i*z),
catan(z) = -i * catanh(i*z).
SEE ALSO casinh(3)catanh(3)complex(3)STANDARDS
The casin() and catan() functions conform to ISO/IEC 9899:2011.
4th Berkeley Distribution December 11, 2006 4th Berkeley Distribution
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