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Prove that cosAcotAsinAtanAcosecAsecA=1+sinAcosA

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LHS=cosAcotAsinAtanAcscAsecA=cos2AsinAsin2AcosA1sinA1cosA=cos3Asin3AcosAsinA=(cosAsinA)(cos2A+cosAsinA+sin2A)(cosAsinA)=1+cosAsinA=RHS

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Algebra of Derivatives
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