1*48923Scael.\" Copyright (c) 1991 The Regents of the University of California. 2*48923Scael.\" All rights reserved. 3*48923Scael.\" 4*48923Scael.\" %sccs.include.redist.man% 5*48923Scael.\" 6*48923Scael.\" @(#)tan.3 5.1 (Berkeley) 05/02/91 7*48923Scael.\" 8*48923Scael.Dd 9*48923Scael.Dt TAN 3 10*48923Scael.Os 11*48923Scael.Sh NAME 12*48923Scael.Nm tan 13*48923Scael.Nd tangent function 14*48923Scael.Sh SYNOPSIS 15*48923Scael.Fd #include <math.h> 16*48923Scael.Ft double 17*48923Scael.Fn tan "double x" 18*48923Scael.Sh DESCRIPTION 19*48923ScaelThe 20*48923Scael.Fn tan 21*48923Scaelfunction computes the tangent of 22*48923Scael.Fa x 23*48923Scael(measured in radians). 24*48923ScaelA large magnitude argument may yield a result 25*48923Scaelwith little or no significance. 26*48923ScaelFor a discussion of error due to roundoff, see 27*48923Scael.Xr math 3 . 28*48923Scael.Sh RETURN VALUES 29*48923ScaelThe 30*48923Scael.Fn tan 31*48923Scaelfunction returns the tangent value. 32*48923Scael.Sh SEE ALSO 33*48923Scael.Xr acos 3 , 34*48923Scael.Xr asin 3 , 35*48923Scael.Xr atan 3 , 36*48923Scael.Xr atan2 3 , 37*48923Scael.Xr cos 3 , 38*48923Scael.Xr cosh 3 , 39*48923Scael.Xr sin 3 , 40*48923Scael.Xr sinh 3 , 41*48923Scael.Xr tanh 3 , 42*48923Scael.Xr math 3 , 43*48923Scael.Sh STANDARDS 44*48923ScaelThe 45*48923Scael.Fn tan 46*48923Scaelfunction conforms to 47*48923Scael.St -ansiC . 48