13a8617a8SJordan K. Hubbard.\" Copyright (c) 1991 The Regents of the University of California. 23a8617a8SJordan K. Hubbard.\" All rights reserved. 33a8617a8SJordan K. Hubbard.\" 43a8617a8SJordan K. Hubbard.\" Redistribution and use in source and binary forms, with or without 53a8617a8SJordan K. Hubbard.\" modification, are permitted provided that the following conditions 63a8617a8SJordan K. Hubbard.\" are met: 73a8617a8SJordan K. Hubbard.\" 1. Redistributions of source code must retain the above copyright 83a8617a8SJordan K. Hubbard.\" notice, this list of conditions and the following disclaimer. 93a8617a8SJordan K. Hubbard.\" 2. Redistributions in binary form must reproduce the above copyright 103a8617a8SJordan K. Hubbard.\" notice, this list of conditions and the following disclaimer in the 113a8617a8SJordan K. Hubbard.\" documentation and/or other materials provided with the distribution. 12*fbbd9655SWarner Losh.\" 3. Neither the name of the University nor the names of its contributors 133a8617a8SJordan K. Hubbard.\" may be used to endorse or promote products derived from this software 143a8617a8SJordan K. Hubbard.\" without specific prior written permission. 153a8617a8SJordan K. Hubbard.\" 163a8617a8SJordan K. Hubbard.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 173a8617a8SJordan K. Hubbard.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 183a8617a8SJordan K. Hubbard.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 193a8617a8SJordan K. Hubbard.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 203a8617a8SJordan K. Hubbard.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 213a8617a8SJordan K. Hubbard.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 223a8617a8SJordan K. Hubbard.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 233a8617a8SJordan K. Hubbard.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 243a8617a8SJordan K. Hubbard.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 253a8617a8SJordan K. Hubbard.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 263a8617a8SJordan K. Hubbard.\" SUCH DAMAGE. 273a8617a8SJordan K. Hubbard.\" 28f869a8c5SDavid Schultz.Dd January 24, 2008 293a8617a8SJordan K. Hubbard.Dt TAN 3 303a8617a8SJordan K. Hubbard.Os 313a8617a8SJordan K. Hubbard.Sh NAME 327a15a32aSJordan K. Hubbard.Nm tan , 33f869a8c5SDavid Schultz.Nm tanf , 34f869a8c5SDavid Schultz.Nm tanl 357a15a32aSJordan K. Hubbard.Nd tangent functions 3664890443SBruce Evans.Sh LIBRARY 3764890443SBruce Evans.Lb libm 383a8617a8SJordan K. Hubbard.Sh SYNOPSIS 3932eef9aeSRuslan Ermilov.In math.h 403a8617a8SJordan K. Hubbard.Ft double 413a8617a8SJordan K. Hubbard.Fn tan "double x" 427a15a32aSJordan K. Hubbard.Ft float 437a15a32aSJordan K. Hubbard.Fn tanf "float x" 44f869a8c5SDavid Schultz.Ft long double 45f869a8c5SDavid Schultz.Fn tanl "long double x" 463a8617a8SJordan K. Hubbard.Sh DESCRIPTION 473a8617a8SJordan K. HubbardThe 48f869a8c5SDavid Schultz.Fn tan , 49f869a8c5SDavid Schultz.Fn tanf , 50f869a8c5SDavid Schultzand 51f869a8c5SDavid Schultz.Fn tanl 527a15a32aSJordan K. Hubbardfunctions compute the tangent of 533a8617a8SJordan K. Hubbard.Fa x 543a8617a8SJordan K. Hubbard(measured in radians). 553a8617a8SJordan K. HubbardA large magnitude argument may yield a result 563a8617a8SJordan K. Hubbardwith little or no significance. 573a8617a8SJordan K. HubbardFor a discussion of error due to roundoff, see 583a8617a8SJordan K. Hubbard.Xr math 3 . 593a8617a8SJordan K. Hubbard.Sh RETURN VALUES 603a8617a8SJordan K. HubbardThe 61f869a8c5SDavid Schultz.Fn tan , 62f869a8c5SDavid Schultz.Fn tanf , 63f869a8c5SDavid Schultzand 64f869a8c5SDavid Schultz.Fn tanl 65f869a8c5SDavid Schultzfunctions return the tangent value. 663a8617a8SJordan K. Hubbard.Sh SEE ALSO 673a8617a8SJordan K. Hubbard.Xr acos 3 , 683a8617a8SJordan K. Hubbard.Xr asin 3 , 693a8617a8SJordan K. Hubbard.Xr atan 3 , 703a8617a8SJordan K. Hubbard.Xr atan2 3 , 713a8617a8SJordan K. Hubbard.Xr cos 3 , 723a8617a8SJordan K. Hubbard.Xr cosh 3 , 733daee1d6SDavid Schultz.Xr ctan 3 , 7475141cc9SWolfram Schneider.Xr math 3 , 753a8617a8SJordan K. Hubbard.Xr sin 3 , 763a8617a8SJordan K. Hubbard.Xr sinh 3 , 7775141cc9SWolfram Schneider.Xr tanh 3 783a8617a8SJordan K. Hubbard.Sh STANDARDS 79f869a8c5SDavid SchultzThese functions conform to 80f869a8c5SDavid Schultz.St -isoC-99 . 81