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Let P={theta: s intheta-costheta=sqrt(2)...

Let `P={theta: s intheta-costheta=sqrt(2)costheta}a n d\ Q={theta: s intheta+costheta=sqrt(2)s intheta}` be two sets. Then `PsubQ\ a n d Q-P!=O/` b. `Q P` c. `P Q` d. `P=Q`

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