1*86f9d4cdStedu.\" $OpenBSD: tan.3,v 1.12 2013/06/05 03:40:26 tedu Exp $ 2df930be7Sderaadt.\" Copyright (c) 1991 The Regents of the University of California. 3df930be7Sderaadt.\" All rights reserved. 4df930be7Sderaadt.\" 5df930be7Sderaadt.\" Redistribution and use in source and binary forms, with or without 6df930be7Sderaadt.\" modification, are permitted provided that the following conditions 7df930be7Sderaadt.\" are met: 8df930be7Sderaadt.\" 1. Redistributions of source code must retain the above copyright 9df930be7Sderaadt.\" notice, this list of conditions and the following disclaimer. 10df930be7Sderaadt.\" 2. Redistributions in binary form must reproduce the above copyright 11df930be7Sderaadt.\" notice, this list of conditions and the following disclaimer in the 12df930be7Sderaadt.\" documentation and/or other materials provided with the distribution. 136580fee3Smillert.\" 3. Neither the name of the University nor the names of its contributors 14df930be7Sderaadt.\" may be used to endorse or promote products derived from this software 15df930be7Sderaadt.\" without specific prior written permission. 16df930be7Sderaadt.\" 17df930be7Sderaadt.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18df930be7Sderaadt.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19df930be7Sderaadt.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20df930be7Sderaadt.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21df930be7Sderaadt.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22df930be7Sderaadt.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23df930be7Sderaadt.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24df930be7Sderaadt.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25df930be7Sderaadt.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26df930be7Sderaadt.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27df930be7Sderaadt.\" SUCH DAMAGE. 28df930be7Sderaadt.\" 29df930be7Sderaadt.\" from: @(#)tan.3 5.1 (Berkeley) 5/2/91 30df930be7Sderaadt.\" 31*86f9d4cdStedu.Dd $Mdocdate: June 5 2013 $ 32df930be7Sderaadt.Dt TAN 3 33df930be7Sderaadt.Os 34df930be7Sderaadt.Sh NAME 358a2f5500Sderaadt.Nm tan , 36854ac34eSmartynas.Nm tanf , 37854ac34eSmartynas.Nm tanl 388a2f5500Sderaadt.Nd tangent functions 39df930be7Sderaadt.Sh SYNOPSIS 40*86f9d4cdStedu.In math.h 41df930be7Sderaadt.Ft double 42df930be7Sderaadt.Fn tan "double x" 43df930be7Sderaadt.Ft float 44df930be7Sderaadt.Fn tanf "float x" 45854ac34eSmartynas.Ft long double 46854ac34eSmartynas.Fn tanl "long double x" 47df930be7Sderaadt.Sh DESCRIPTION 48df930be7SderaadtThe 49df930be7Sderaadt.Fn tan 5007fc7eacSjasonfunction computes the tangent of 51df930be7Sderaadt.Fa x 52df930be7Sderaadt(measured in radians). 5307fc7eacSjasonThe 5407fc7eacSjason.Fn tanf 5507fc7eacSjasonfunction is a single precision version of 5607fc7eacSjason.Fn tan . 57854ac34eSmartynasThe 58854ac34eSmartynas.Fn tanl 59854ac34eSmartynasfunction is an extended precision version of 60854ac34eSmartynas.Fn tan . 61df930be7SderaadtA large magnitude argument may yield a result 62df930be7Sderaadtwith little or no significance. 63df930be7Sderaadt.Sh RETURN VALUES 64df930be7SderaadtThe 65854ac34eSmartynas.Fn tan , 6607fc7eacSjason.Fn tanf 67854ac34eSmartynasand 68854ac34eSmartynas.Fn tanl 6907fc7eacSjasonfunctions return the tangent value. 70df930be7Sderaadt.Sh SEE ALSO 71df930be7Sderaadt.Xr acos 3 , 72df930be7Sderaadt.Xr asin 3 , 73df930be7Sderaadt.Xr atan 3 , 74df930be7Sderaadt.Xr atan2 3 , 75df930be7Sderaadt.Xr cos 3 , 76df930be7Sderaadt.Xr cosh 3 , 77df930be7Sderaadt.Xr sin 3 , 78df930be7Sderaadt.Xr sinh 3 , 79350bb3b8Salex.Xr tanh 3 80df930be7Sderaadt.Sh STANDARDS 81df930be7SderaadtThe 82df930be7Sderaadt.Fn tan 83df930be7Sderaadtfunction conforms to 84df930be7Sderaadt.St -ansiC . 85