Author: Oscar Cronquist Article last updated on May 04, 2022

The ATAN function calculates the arctangent of a number. The returned angle is in radians between -pi/2 to pi/2.

=ATAN(B3)

Excel Function Syntax

ATAN(number)

Arguments

number Required. The tangent of the angle.

Comments

Use the DEGREES function to convert radians to degrees.

=DEGREES(ATAN(-1))

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