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If tan x - tany = a and cot y - cot ...

If ` tan x - tany = a and cot y - cot x =b ,` then cot (x-y) is

A

`a+b `

B

`1/a -1/b`

C

`1/a +1/b`

D

`a-b`

Text Solution

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The correct Answer is:
C
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