If sin A+ sin 2A = x and cos A + cos 2A ...

If sin A+ sin 2A = x and cos A + cos 2A = y, then `(x^(2)+y^(2)) (x^(2)+y^(2)-3)=`

A

`2y`

B

`y`

C

3y

D

4y

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The correct Answer is:

A

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