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[" 25.Let "P={theta:sin theta-cos theta=...

[" 25.Let "P={theta:sin theta-cos theta=sqrt(2)cos theta}" and "],[Q={theta:sin theta+cos theta=sqrt(2)sin theta}" be two sets.Then "],[" 1) "P sub Q" and "Q-P!=phi],[" 2) "Q(Pquad " 3) "P o+ Qquad " 4) "P=Q]

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