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tanh(3) [freebsd man page]

TANH(3) 						   BSD Library Functions Manual 						   TANH(3)

NAME
tanh, tanhf, tanhl -- hyperbolic tangent functions LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double tanh(double x); float tanhf(float x); long double tanhl(long double x); DESCRIPTION
The tanh(), tanhf(), and tanhl() functions compute the hyperbolic tangent of x. For a discussion of error due to roundoff, see math(3). RETURN VALUES
The tanh(), tanhf(), and the tanhl() functions return the hyperbolic tangent value. SEE ALSO
acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), ctanh(3), math(3), sin(3), sinh(3), tan(3) STANDARDS
The tanh() function conforms to ISO/IEC 9899:1990 (``ISO C90''). BSD
August 17, 2013 BSD

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TANH(3) 						   BSD Library Functions Manual 						   TANH(3)

NAME
tanh, tanhf -- hyperbolic tangent function LIBRARY
Math Library (libm, -lm) SYNOPSIS
#include <math.h> double tanh(double x); float tanhf(float x); DESCRIPTION
The tanh() and tanhf() functions compute the hyperbolic tangent of x. 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. If x is +- 0, x is returned. 2. If x is NaN, a NaN is returned. 3. If x is positive infinity, a value 1 is returned; if x is negative infinity, -1 is returned. 4. If x is subnormal, a range error can occur and x is 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''). BSD
September 18, 2011 BSD
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