Expressions Guide - ACOS (Functions)

The ACOS function is a mathematical function that returns the inverse Cosine (radians) of a number. The ACOS function returns a real value.

Function Name	ACOS
Description	Returns the inverse Cosine (radians) of a number.
Arguments	ACOS(INTEGER or REAL) The ACOS function can have one input and this can be either an integer or a real floating value—see Number (Integer or Real).
Returns	REAL The inverse Cosine (radians) value of the input.

Example:

ACOS( -1 )

The output is PI (3.1415926...)

See also:

ASIN, ATAN (Inverse Tangent).