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If tan A - tan B = x and cot B - cot A =...

If tan A - tan B = x and cot B - cot A =y , then what is cot ( A -B) equal to ?

A

`1/x +y`

B

`(1)/(xy)`

C

`(1)/(x) -(1)/(y)`

D

`(1)/(x) +1/y`

Text Solution

Verified by Experts

The correct Answer is:
D
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