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Inverse Tangent of a Sum of Fractions
## Formula
$$\tan^{-1}\frac{x+y}{1-xy}=\tan^{-1}x+\tan^{-1}y$$
when the principal-value condition is satisfied.
## Usage
- Used to recognize a sum of inverse tangent terms from a single fractional argument.
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Inverse Tangent of a Sum of Fractions
## Formula
$$\tan^{-1}\frac{x+y}{1-xy}=\tan^{-1}x+\tan^{-1}y$$
when the principal-value condition is satisfied.
## Usage
- Used to recognize a sum of inverse tangent terms from a single fractional argument.
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