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#include <math.h>
double
atanh(double x)
float
atanhf(float x)
DESCRIPTION
The atanh() and atanhf() functions compute the inverse hyperbolic tangent
of the real argument x.
RETURN VALUES
Exceptional conditions are handled by matherr(3).
SEE ALSO
acosh(3), asinh(3), exp(3), infnan(3), math(3), matherr(3)
HISTORY
The atanh() function appeared in 4.3BSD.
4.3 Berkeley Distribution May 6, 1991 1
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