JEE MATHEMATICS MCQ: TRIGONOMETRIC EQUATIONS

1 Easy

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Understanding +4 | -1

\triangle A B C

, the value of the expression

\operatorname{cosec} A(\sin B \cos C+\cos B \sin C)

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Correct option: A

Option A (1) is correct because the expression simplifies to

\operatorname{cosec} A \sin(B+C) = \operatorname{cosec} A \sin(\pi - A) = \operatorname{cosec} A \sin A = 1

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