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If x +y= 3-cos4theta and x-y=4sin2theta ...

If `x +y= 3-cos4theta` and `x-y=4sin2theta` then

A

`x^(4)+y^(4)=9`

B

`sqrt(x)+sqrt(y)=16`

C

`x^(3)+y^(3)=2(x^(2)+y^(2))`

D

`sqrt(x)+sqrt(y)=2`

Text Solution

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The correct Answer is:
A
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