Prove that cos²A/(1 - tanA) + sin³A/sinA - cosA = 1 + sinA cosA

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cos^2A/1-tanA+sin^3A/sinA-cosA=1+sinAcosA

cos2A/1-tanA + sin3A/sinA-cosA = 1+sinA cosA

solve (cos^2A/1-tanA)+(Sin^3A/SinA-CosA)

cos²A/(1 - tanA) + sin³A/sinA - cosA = 1 + sinA cosA
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