sum(k=1)^(13)(1)/(sin((pi)/(4)+((k-1)pi)...

`sum_(k=1)^(13)(1)/(sin((pi)/(4)+((k-1)pi)/(6))sin((pi)/(4)+(kpi)/(6)))` का मान है

A

`3-sqrt(3)`

B

`2(3-sqrt(3))`

C

`2(sqrt(3)-1)`

D

`2(2+sqrt(3))`

Verified by Experts

The correct Answer is:

C

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