NAME
    sinh - hyperbolic sine

SYNOPSIS
    sinh(x [,acc])

TYPES
    x		real
    acc		real

    return	real

DESCRIPTION
    Calculate the hyperbolic sine of x with an accuracy within acc.
    By default, acc is epsilon().

    The hyperbolic sine is calculated using the formula:

	cosh(x)^2 - sinh(x)^2 = 1

    with special case given to the sign of the result.

EXAMPLE
    > print sinh(-1), sinh(0), sinh(2^-37)
    ~-1.17520119364380145688 0 ~.00000000000727595761

    > print sinh(0.4), sinh(0.4, 0.01), sinh(asin(1), 0.001)
    ~.41075232580281550854 .41064453125 2.30129241943359375

LIMITS
    acc > 0

LIBRARY
    NUMBER *qsinh(NUMBER *x, *acc)

SEE ALSO
   acosh, asinh, atanh, cosh, epsilon, tanh
