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Current Chapters-> acos asin atan cos cosh exp log log10 sin sinh tan tanh log2 pow2 atan2 angle asinh acosh atanh hypot

Parent Chapters-> Omatrix6 elementary transcendental acosh

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Inverse Hyperbolic Cosine Function

Syntax	acosh(y)
See Also	cosh , asinh , atanh

Description
Returns the element-by-element inverse cosh of y, where y is a real or double-precision matrix such that y(i, j) > 1 for all (i, j).

Note that cosh(x) = cosh(-x), so there are two choices for its inverse. The return value of acosh is the positive inverse.

Example
     acosh(pi)
returns
     1.81153