TANH(3) NetBSD Library Functions Manual TANH(3)NAME

tanh,tanhf-- hyperbolic tangent functionLIBRARY

Math Library (libm, -lm)SYNOPSIS

#include <math.h>doubletanh(double x);floattanhf(float x);DESCRIPTION

Thetanh() andtanhf() functions compute the hyperbolic tangent ofx. For a discussion of error due to roundoff, see math(3).RETURN VALUES

Upon successful completion, these functions return the hyperbolic tangent value. The following may also occur: 1. Ifxis ± 0,xis returned. 2. IfxisNaN, aNaNis returned. 3. Ifxis positive infinity, a value 1 is returned; ifxis neg- ative infinity, -1 is returned. 4. Ifxis subnormal, a range error can occur andxis returned.SEE ALSO

acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3), sinh(3), tan(3)STANDARDS

The described functions conform to ISO/IEC 9899:1999 (``ISO C99''). NetBSD 10.0 September 18, 2011 NetBSD 10.0

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