calculate the inverse hyperbolic cosine of given angle

Parameters

acosh angle :integer :floating :complex :rational :quantity

Returns

Examples

copy
print acosh 1.0             ; 0.0
print acosh 2               ; 1.316957896924817
print acosh 5.0             ; 2.292431669561178

copy
acosh to :complex @[pi 1]
; => 1.86711439316026+0.3222532939814587i

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