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Prove that: cosA1tanA+sinA1cotA=cosA+sinA

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Solution

cosA1tanA+sinA1cotA
=cosA1sinAcosA+sinA1cosAsinA
=cos2AcosAsinA+sin2AsinAcoaA
=cos2Asin2AcosAsinA
=cosA+sinA
Hence , Proved.

1214283_1296548_ans_5b704461e4ee4791b53723c2f537fff5.jpg

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