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Question

cos Acot A+sin A= ?


A

cot A

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B

2 sin A

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C

2 cos A

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D

sec A

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Solution

The correct option is B

2 sin A


cosAcotA+sinA

=cosA(cosAsinA)+sinA (cotA=cosAsinA)

=sin A+sin A=2 sin A

cosAcotA+sinA=2 sin A


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