Expression, S = \sum {{{Cos\left( {{{B - C} \over 2}} \right)} \over {Cos\left( {{{B + C} \over 2}} \right)}}}

The .pdf file with detailed solution is embedded below. The password to open the file is 123iitjee.

Download (PDF, 77KB)

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Manish Verma
Technocrat by Qualification, Philosopher at Heart.

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