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Sum to n terms of the series \operatorname{sinθ\operatorname{sin2θ+\operatorname{sin2θ\operatorname{sin3θ+\operatorname{sin3θ\operatorname{sin4θ+...... is equal to

Answer» Sum to n terms of the series \operatorname{sinθ\operatorname{sin2θ+\operatorname{sin2θ\operatorname{sin3θ+\operatorname{sin3θ\operatorname{sin4θ+...... is equal to


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