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The set S_(1) and S_(2) are solution sets of (1+a)cos theta cos (2 thetacos (2 theta-b)=(1+a cos 2 theta)cos (theta-b) |
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Answer» `{n PI , n in Z}` and `1/2 {n pi +(-1)^(n)SIN^(-1)(a sin b)=b , n in Z}` |
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