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.\" Copyright (c) 2026 Bruce Hill
.\" All rights reserved.
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.TH Num.cos 3 2026-08-27 "Tomo man-pages"
.SH NAME
Num.cos \- cosine
.SH LIBRARY
Tomo Standard Library
.SH SYNOPSIS
.nf
.BI Num.cos\ :\ func(x:\ Num\ ->\ Num)
.fi
.SH DESCRIPTION
The cosine of an angle in radians.


.SH ARGUMENTS

.TS
allbox;
lb lb lbx
l l l.
Name	Type	Description
x	Num	The angle in radians. 
.TE
.SH RETURN
The cosine of `x`.

.SH EXAMPLES
.EX
assert (0.).cos() == 1
assert Num.PI.cos() == -1
.EE
.SH SEE ALSO
.BR Tomo-Num (3)