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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/y-1/x`

B

`1/x-1/y`

C

`1/x+1/y`

D

`-1/x-1/y`

Text Solution

Verified by Experts

The correct Answer is:
C
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