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tan^(-1)x-tan^(-1)y=tan^(-1)((x-y)/(1+xy...

`tan^(-1)x-tan^(-1)y=tan^(-1)((x-y)/(1+xy))` holds good for

A

All `x, y in R`

B

`absx lt 1absy lt 1`

C

`absx gt1,absygt1`

D

`xy gt -1`

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The correct Answer is:
D
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