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= Sec P(cos R + sin P) / Cosec R (sin R – Cosec P) = (Cos R/cos P + Sin P/cos P) / (1 – Cosec P/sin R) = Cos R + Sin P/Cos P × Sin R/Sin R – cosec P = (1/√10 + 1/√10) / (3√10) × (3√10) / (3√10 - √10) = 2/√10 × √10/3 ×√10 × √10/-7 = ̶ 2/7
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