Atn Function

Language Items List

Definition:

A trigonometric function that returns the arctangent of the supplied numeric expression.

Syntax:

Atn (number)

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Syntax Description

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number The ratio between two sides of a right triangle. It can be any valid numeric expression.

Details:

The Atn Function returns the arctangent of the ratio, or number, of two sides of a right triangle. The Atn function takes this ratio and returns the corresponding angle in radians in the range -Pi/2 to Pi/2 radians. (Pi is approximately 3.141593.)

To convert radians to degrees, use the following formula: Radians * 180/Pi

The arctangent is the inverse of Tan (tangent) and should not be confused with the simple inverse of a tangent, the cotangent.

See Also:

Tan Function
Derived Math Functions