Book: Mathematics Part-II
Chapter: 7. Integrals
Subject: Maths - Class 12th
Q. No. 10 of Exercise 7.10
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If 
then f'(x) is
Given: 
Applying product rule,
⇒ 
= -x cos x + sin x – 0
⇒ f(x) = -x cos x + sinx
⇒ f'(x) = -[{x(-sinx )} + cosx ] + cosx
= x sin x – cos x + cos x
= x sin x
Correct answer is B.
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