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{ If }\operatorname{sin}θ_1+\operatorname{sin}θ_2+\operatorname{sin}θ_3=3, then }}{\operatorname{cos}θ_1+\operatorname{cos}θ_2+\operatorname{cos}θ_3 is equal to

Answer» { If }\operatorname{sin}θ_1+\operatorname{sin}θ_2+\operatorname{sin}θ_3=3, then }}{\operatorname{cos}θ_1+\operatorname{cos}θ_2+\operatorname{cos}θ_3 is equal to


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