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If cosx=(2cosy-1)/(2-cosy) then tan""(...

If `cosx=(2cosy-1)/(2-cosy)` then `tan""(x)/2.cot""(y)/2 = ? `

A

1

B

0

C

`-1`

D

`sqrt3`

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ADVANCED MATHS BY ABHINAY MATHS ENGLISH-MAINS MOCK TEST -QUESTION
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