Class 11MathematicsTrigonometrical Ratios, Functions and IdentitiesTrigonometrical ratios of sum and difference of two and three angles
MediumIf $\tan A + \tan B = x$ and $\cot A + \cot B = y$,then $\tan (A + B) =$
- A$\frac{xy}{x-y}$
- B$\frac{xy}{y-x}$
- C$\frac{xy}{x+y}$
- D$\frac{x-y}{xy}$
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