## Linux and UNIX Man Pages

Test Your Knowledge in Computers #156
Difficulty: Easy
The first two-network TCP/IP communications test was performed between Stanford and University College London, in 1975.
True or False?

# ctan(3m) [opensolaris man page]

```ctan(3M)						  Mathematical Library Functions						  ctan(3M)

NAME
ctan, ctanf, ctanl - complex tangent functions

SYNOPSIS
c99 [ flag... ] file... -lm [ library... ]
#include <complex.h>

double complex ctan(double complex z);

float complex ctanf(float complex z);

long double complex ctanl(long double complex z);

DESCRIPTION
These functions compute the complex tangent of z.

RETURN VALUES
These functions return the complex tangent value.

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			   |
+-----------------------------+-----------------------------+

SunOS 5.11							    12 Jul 2006 							  ctan(3M)```

## Check Out this Related Man Page

```CTAN(3)                                                      Linux Programmer's Manual                                                     CTAN(3)

NAME
ctan, ctanf, ctanl - complex tangent function

SYNOPSIS
#include <complex.h>

double complex ctan(double complex z);
float complex ctanf(float complex z);
long double complex ctanl(long double complex z);

DESCRIPTION
These functions calculate the complex tangent of z.

The complex tangent function is defined as:

ctan(z) = csin(z) / ccos(z)

VERSIONS
These functions first appeared in glibc in version 2.1.

ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).

+-------------------------+---------------+---------+
|Interface                | Attribute     | Value   |
+-------------------------+---------------+---------+
|ctan(), ctanf(), ctanl() | Thread safety | MT-Safe |
+-------------------------+---------------+---------+

CONFORMING TO
C99, POSIX.1-2001, POSIX.1-2008.

cabs(3), catan(3), ccos(3), csin(3), complex(7)

COLOPHON
This  page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and the

2017-09-15                                                             CTAN(3)```

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