ATAN (arctangent)

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ATAN (arctangent)

Syntax:

ATAN(Number)

Description:

Returns the arctangent of Number, i.e., the angle whose tangent is Number.

The result is expressed in radians.

Example:

ATAN(1) returns 0.7854 (45°)

ATAN(TAN(0.1234)) returns 0.1234

Tip:

You can use the DEGREES function to convert the result from radians to degrees.

See also:

ATAN2, TAN, ACOS, ASIN