'\"
'\" Generated from file 'trig\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2018 Arjen Markus
'\"
.TH "math::trig" n 1\&.1 tcllib "Tcl Math Library"
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.BS
.SH NAME
math::trig \- Trigonometric anf hyperbolic functions
.SH SYNOPSIS
package require \fBTcl 8\&.5 9\fR
.sp
package require \fBmath::trig 1\&.1\fR
.sp
\fB::math::trig::radian_reduced\fR \fIangle\fR
.sp
\fB::math::trig::degree_reduced\fR \fIangle\fR
.sp
\fB::math::trig::cosec\fR \fIangle\fR
.sp
\fB::math::trig::sec\fR \fIangle\fR
.sp
\fB::math::trig::cotan\fR \fIangle\fR
.sp
\fB::math::trig::acosec\fR \fIvalue\fR
.sp
\fB::math::trig::asec\fR \fIvalue\fR
.sp
\fB::math::trig::acotan\fR \fIvalue\fR
.sp
\fB::math::trig::cosech\fR \fIvalue\fR
.sp
\fB::math::trig::sech\fR \fIvalue\fR
.sp
\fB::math::trig::cotanh\fR \fIvalue\fR
.sp
\fB::math::trig::asinh\fR \fIvalue\fR
.sp
\fB::math::trig::acosh\fR \fIvalue\fR
.sp
\fB::math::trig::atanh\fR \fIvalue\fR
.sp
\fB::math::trig::acosech\fR \fIvalue\fR
.sp
\fB::math::trig::asech\fR \fIvalue\fR
.sp
\fB::math::trig::acotanh\fR \fIvalue\fR
.sp
\fB::math::trig::sind\fR \fIangle\fR
.sp
\fB::math::trig::cosd\fR \fIangle\fR
.sp
\fB::math::trig::tand\fR \fIangle\fR
.sp
\fB::math::trig::cosecd\fR \fIangle\fR
.sp
\fB::math::trig::secd\fR \fIangle\fR
.sp
\fB::math::trig::cotand\fR \fIangle\fR
.sp
.BE
.SH DESCRIPTION
.PP
The \fImath::trig\fR package defines a set of trigonomic and hyperbolic functions
and their inverses\&. In addition it defines versions of the trigonomic functions
that take arguments in degrees instead of radians\&.
.PP
For easy use these functions may be imported into the \fItcl::mathfunc\fR namespace,
so that they can be used directly in the \fIexpr\fR command\&.
.SH FUNCTIONS
The functions \fIradian_reduced\fR and \fIdegree_reduced\fR return a reduced angle, in
respectively radians and degrees, in the intervals [0, 2pi) and [0, 360):
.TP
\fB::math::trig::radian_reduced\fR \fIangle\fR
Return the equivalent angle in the interval [0, 2pi)\&.
.RS
.TP
float \fIangle\fR
Angle (in radians)
.RE
.TP
\fB::math::trig::degree_reduced\fR \fIangle\fR
Return the equivalent angle in the interval [0, 360)\&.
.RS
.TP
float \fIangle\fR
Angle (in degrees)
.RE
.PP
The following trigonomic functions are defined in addition to the ones defined
in the \fIexpr\fR command:
.TP
\fB::math::trig::cosec\fR \fIangle\fR
Calculate the cosecant of the angle (1/cos(angle))
.RS
.TP
float \fIangle\fR
Angle (in radians)
.RE
.TP
\fB::math::trig::sec\fR \fIangle\fR
Calculate the secant of the angle (1/sin(angle))
.RS
.TP
float \fIangle\fR
Angle (in radians)
.RE
.TP
\fB::math::trig::cotan\fR \fIangle\fR
Calculate the cotangent of the angle (1/tan(angle))
.RS
.TP
float \fIangle\fR
Angle (in radians)
.RE
.PP
For these functions also the inverses are defined:
.TP
\fB::math::trig::acosec\fR \fIvalue\fR
Calculate the arc cosecant of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::asec\fR \fIvalue\fR
Calculate the arc secant of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::acotan\fR \fIvalue\fR
Calculate the arc cotangent of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.PP
The following hyperbolic and inverse hyperbolic functions are defined:
.TP
\fB::math::trig::cosech\fR \fIvalue\fR
Calculate the hyperbolic cosecant of the value (1/sinh(value))
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::sech\fR \fIvalue\fR
Calculate the hyperbolic secant of the value (1/cosh(value))
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::cotanh\fR \fIvalue\fR
Calculate the hyperbolic cotangent of the value (1/tanh(value))
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::asinh\fR \fIvalue\fR
Calculate the arc hyperbolic sine of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::acosh\fR \fIvalue\fR
Calculate the arc hyperbolic cosine of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::atanh\fR \fIvalue\fR
Calculate the arc hyperbolic tangent of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::acosech\fR \fIvalue\fR
Calculate the arc hyperbolic cosecant of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::asech\fR \fIvalue\fR
Calculate the arc hyperbolic secant of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.TP
\fB::math::trig::acotanh\fR \fIvalue\fR
Calculate the arc hyperbolic cotangent of the value
.RS
.TP
float \fIvalue\fR
Value of the argument
.RE
.PP
The following versions of the common trigonometric functions and their
inverses are defined:
.TP
\fB::math::trig::sind\fR \fIangle\fR
Calculate the sine of the angle (in degrees)
.RS
.TP
float \fIangle\fR
Angle (in degrees)
.RE
.TP
\fB::math::trig::cosd\fR \fIangle\fR
Calculate the cosine of the angle (in degrees)
.RS
.TP
float \fIangle\fR
Angle (in radians)
.RE
.TP
\fB::math::trig::tand\fR \fIangle\fR
Calculate the cotangent of the angle (in degrees)
.RS
.TP
float \fIangle\fR
Angle (in degrees)
.RE
.TP
\fB::math::trig::cosecd\fR \fIangle\fR
Calculate the cosecant of the angle (in degrees)
.RS
.TP
float \fIangle\fR
Angle (in degrees)
.RE
.TP
\fB::math::trig::secd\fR \fIangle\fR
Calculate the secant of the angle (in degrees)
.RS
.TP
float \fIangle\fR
Angle (in degrees)
.RE
.TP
\fB::math::trig::cotand\fR \fIangle\fR
Calculate the cotangent of the angle (in degrees)
.RS
.TP
float \fIangle\fR
Angle (in degrees)
.RE
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fImath :: trig\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.PP
When proposing code changes, please provide \fIunified diffs\fR,
i\&.e the output of \fBdiff -u\fR\&.
.PP
Note further that \fIattachments\fR are strongly preferred over
inlined patches\&. Attachments can be made by going to the \fBEdit\fR
form of the ticket immediately after its creation, and then using the
left-most button in the secondary navigation bar\&.
.SH KEYWORDS
math, trigonometry
.SH CATEGORY
Mathematics
.SH COPYRIGHT
.nf
Copyright (c) 2018 Arjen Markus

.fi