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If xy<1,tan^-1x+tan^-1y=........ a)tan^-...

If `xy<1,tan^-1x+tan^-1y`=........ a)`tan^-1(frac(x-y)(1+xy))`
b)`tan^-1(frac(x+y)(1-xy))` c)`(tanx+tany)/(1-tanxtany)` d)`(tanx-tany)/(1-tanxtany)`

A

`tan^-1(frac(x-y)(1+xy))`

B

`tan^-1(frac(x+y)(1-xy))`

C

`(tanx+tany)/(1-tanxtany)`

D

`(tanx-tany)/(1=tanxtany)`

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