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Question

(1+sinA)(1sinA)=2cos(A/2)


A

A

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B

A

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C

A

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D

A

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Solution

The correct option is C

A


1+sinA - 1sinA=2cos(A2)

|cosA2+sinA2||cosA2sinA2|=2cosA2

5π2<A<7π2


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