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Suppose is an angle such that cos(?)=-1/3If 0 < ? < ?, then cos(?/2)=_____and sin(?/2)=_____If...

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Suppose is an angle such that cos(?)=-1/3If 0 < ? < ?, then cos(?/2)=_____and sin(?/2)=_____If ? < ? < 2?,then cos(?/2)=_____and sin(?/2)=______If 2? < ? < 3?,then cos(?/2)=______and sin(?/2)=_____

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