what is sin 2 theta cos 2 theta equal to（関連順）

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If 2 sin^2 theta - cos^2 theta = 2, then find the value of theta

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`cos 2theta cos 2phi + sin^2(theta-phi)-sin^2(theta+phi)=cos(2theta + 2phi)`

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結果 : what is sin 2 theta cos 2 theta equal to