Question

$\underset{\pi /4}{\overset{3\pi /4}{\int }}\frac{dx}{1+\cos x}$ is equal to :

• A. 2
• B. -2
• C. $\frac{1}{2}$
• D. $-\frac{1}{2}$

Answer 1

Answer: (A)

Correct answer is (a) 2