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11 December, 03:24

Cos (2pi/28) cosec (3pi/28) + cos (6pi/28) cosec (9pi/28) + cos (18pi/28) cosec (27pi/28) = 0

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  1. 11 December, 05:38
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    Sorry, I cannot answer this as this is a question I don't understand. You are pretty High-Tech BTW.
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