Question

For $0\lt \theta \lt \pi/2$, the solution(s) of $\sum_{m=1}^{6}cosec\left(\theta+(m-1)\frac{\pi}{4}\right)cosec(\theta+\frac{m\pi}{4})=4\sqrt{2}$ is/are
A. π/4
B. π/6
C. π/12
D. 5π/12
Choose the correct answer from the options given below:

• A. A and B only
• B. C and D only
• C. A and C only
• D. B and D only

Answer 1

Answer: (B)

C and D only

Answer 2

The correct answer is(B): C and D only