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[" Rublruk "13" Frowthrt "(1-sin theta+c...

[" Rublruk "13" Frowthrt "(1-sin theta+cos theta)^(2)=2(1+cos theta)(1-sin theta)],[" socumon we know that "(a-b+c)^(2)=a^(2)+b^(2)+c^(2)-2a^(2)-2hc+2n]

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