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sin alpha =(2xy)/(x^2+y^2) => sec alpha ...

`sin alpha =(2xy)/(x^2+y^2) => sec alpha - tan alpha=`

A

`(p-q)/(p+q)`

B

`(pq)/(p^(2) +q^(2))`

C

`(p+q)/(p-q)`

D

`(pq)/(P+q)`

Text Solution

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The correct Answer is:
A
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