Evaluate Cos70 / sin20 + cos55 cosec35 / tan5 tan25 tan45 tan65 tan85

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Cos70 / sin20 + cos55 cosec35 / tan5 tan25 tan45 tan65 tan85

prove Cos70 / sin20 + cos55 cosec35 / tan5 tan25 tan65 tan85=2
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Evaluate Cos70 / sin20 + cos55 cosec35 / tan5 tan25 tan45 tan65 tan85

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