IIT JEE 2009 P2 Q28

for 0<Î¸<Ï€/2, th esolutions of

\sum_{m=1}^{6}{cosec(\theta+(m-1)\pi/4)}cosec(\theta+(m)\pi/4)=4\sqrt{2}
is (are)

A) pi/4 B) Pi/6 C) pi/12 D) 5pi/12

2 Answers

i think it is B and D

it is cd

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