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If x = cosecA + cosA and y = cosecA - co...

If x = cosecA + cosA and y = cosecA - cosA, then find the value of `(2/(x+y))^2 +((x-y)/2)^2 -1`.
यदि x = cosecA + cosA और y =cosecA - cosA, तो `(2/(x+y))^2 +((x-y)/2)^2 -1` का मान ज्ञात करें:

A

3

B

0

C

2

D

1

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