Expressions Guide - ATAN (Inverse Tangent) (Functions)

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

Function Name	ATAN
Description	Returns the inverse Tangent (radians) of a number.
Arguments	ATAN(INTEGER or REAL) The ATAN 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 Tangent (radians) value of the input.

Example:

ATAN(1)

The output is 0.785

See also:

ACOS, ASIN, PI.