If \[{{\tan }^{-1}}x-{{\tan }^{-1}}y={{\tan }^{-1}}A,\]then A = [MP PET 1988]

If \[{{\tan }^{-1}}x-{{\tan }^{-1}}y={{\tan }^{-1}}A,\]then A = [MP PE

1.	If \[{{\tan }^{-1}}x-{{\tan }^{-1}}y={{\tan }^{-1}}A,\]then A = [MP PET 1988]
A.	\[x-y\]
B.	\[x+y\]
C.	\[\frac{x-y}{1+xy}\]
D.	\[\frac{x+y}{1-xy}\]
Answer» D. \[\frac{x+y}{1-xy}\]

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If \[{{\tan }^{-1}}x-{{\tan }^{-1}}y={{\tan }^{-1}}A,\]then A = [MP PET 1988]

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