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[" In a "Delta ABC(bc sin^(2)A)/(cos A+c...

[" In a "Delta ABC(bc sin^(2)A)/(cos A+cos B cos C)" is equal to "],[[" (A) "b^(2)+c^(2)," (B) bc "," (C) "a^(2)," (D) "a^(2)+bc]]

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