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Choose the most appropriate options.
Let `P = { theta : sin theta - cos theta = sqrt2 cos theta } and, Q = { theta sin theta + cos theta = sqrt2 sin theta}` be two sets . Then,

A

`P sub Q and Q - P ne phi`

B

`Q cancel(in)P`

C

`P cancel(in) Q`

D

`P =Q`

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The correct Answer is:
D
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