Question

The value of the definite integral $\underset{0}{\overset{3\pi /4}{\int }}((1+x)\sin x+(1-x)\cos x)dx$, is

• A. $2\tan \frac{3\pi }{8}$
• B. $2\tan \frac{\pi }{4}$
• C. $2\tan \frac{\pi }{8}$
• D. 0

Answer 1

Answer: (A)

Correct answer is (a) $2\tan \frac{3\pi }{8}$