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Three-Term Inverse Tangent Identity
## Formula
If:
$$x+y+z=xyz$$
then:
$$\tan^{-1}x+\tan^{-1}y+\tan^{-1}z=\pi$$
when all three variables are positive.
## Usage
- Used in JEE problems involving three inverse tangent terms and the relation $$x+y+z=xyz$$.
