Article updated on March 27, 2018

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))

How to use the DEGREES function

The DEGREES function calculates degrees from radians. Formula in cell C3: =DEGREES(B3) Excel Function Syntax DEGREES(angle) Arguments angle Required. The […]