MCQ
જો ${\tan ^{ - 1}}x - {\tan ^{ - 1}}y = {\tan ^{ - 1}}A $ તો $A = \ .... . . .$
- A$x - y$
- B$x + y$
- ✓$\frac{{x - y}}{{1 + xy}}$
- D$\frac{{x + y}}{{1 - xy}}$
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