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If 2ycostheta=x sintheta and 2xsectheta-...

If `2ycostheta=x sintheta` and `2xsectheta-ycosectheta=3`, then `x^(2)+4y^(2)=?`

A

4

B

1

C

2

D

5

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The correct Answer is:
A
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