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Step-by-step explanation:
=sinA/cosA/1+1/cosA + 1+1/cosA/sinA/cosA
=sinA/cosA/cosA+1/cosA + cosA+1/cosA/sinA/cosA
=sinA.cosA/cos^2A+cosA + cos^2A+cosA/sinA.cosA
=sinA - cosecA + 1
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