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Q.

If f(x)=sin⁡x , then  find f′(x)

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a

14cos⁡xsin⁡x

b

14cos⁡xxcos⁡x

c

14cot⁡xxsin⁡x

d

14cot⁡xcos⁡xx

answer is D.

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Detailed Solution

f'x=12sinx-12×cosx×12x
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