cosec theta - cot + 1 / cosec theta +cot theta +1 = 1-cos theta / sin theta
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Sigma is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200. In general mathematics, uppercase ∑ is used as an operator for summation. When used at the end of a letter-case word, the final form is used. _/|\__/|\_
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