cosec A upon cotA+tan A
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1/sin / cos/sin +sin/cos = 1/sin / 1/sin*cos
= 1/sin * sin*cos = cosA
= 1/sin * sin*cos = cosA
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CosecA / cotA+tanA 1/sinA ÷ cosA/sinA +sinA/cosA 1/sinA ÷ cos^2A + sin^2A/ sinAcosA (sin^2A+ cos^2A = 1) 1/sinA ÷ 1/ sinA cosA 1/sinA × sinA cosA cosA
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