Returns the arctangent, or inverse tangent, of a number. The arctangent is the angle whose tangent is number. The returned angle is given in radians in the range -pi/2 to pi/2.



Number     is the tangent of the angle you want.


To express the arctangent in degrees, multiply the result by 180/PI() or use the DEGREES function.



Description (Result)


Arctangent of 1 in radians, pi/4 (0.785398)


Arctangent of 1 in degrees (45)


Arctangent of 1 in degrees (45)

Need more help?

Expand your skills
Explore Training
Get new features first
Join Microsoft Insiders

Was this information helpful?

What affected your experience?

Any additional feedback? (Optional)

Thank you for your feedback!