acosh

(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)

acosh —Inverse hyperbolic cosine

Description

Returns the inverse hyperbolic cosine ofnum, i.e. the value whose hyperbolic cosine isnum.

Parameters

num

The value to process

Return Values

The inverse hyperbolic cosine ofnum

See Also

• cosh() - Hyperbolic cosine
• acos() - Arc cosine
• asinh() - Inverse hyperbolic sine
• atanh() - Inverse hyperbolic tangent