## What is the arctangent of 0 ?

arctan 0 = ?

The arctangent is the inverse tangent function.

Since

tan 0 = tan 0º = 0

The arctangent of 0 is equal to the inverse tangent function of 0, which is equal to 0 radians or 0 degrees:

arctan 0 = tan^{-1} 0 = 0 rad = 0º