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for 0ltthetaltpi/2 the solution(s) of ...

for `0ltthetaltpi/2 ` the solution(s) of ` sum_(m=1)^6c o s e c(theta+((m-1)pi)/4)c o s e c(theta+(mpi)/n)=4sqrt(2)` is (are):

A

`pi/4`

B

`pi/6`

C

`pi/12`

D

`5pi/12`

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