Q10 of 271 Page 310

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.

More from this chapter

All 271 →
8

Evaluate the integrals using substitution.

 9

The value of the integral is

 1

2