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Prove that (tanA)/((1-cotA))+(cotA)/((1...

Prove that `(tanA)/((1-cotA))+(cotA)/((1-tanA))=(1+tanA+cotA).`

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RS AGGARWAL-TRIGONOMETRIC IDENTITIES-Test Yourself
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  5. If cotA=(4)/(5), then ((sinA+cosA))/((sinA-cosA))=?

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  12. Prove that ("cosec"A-cotA)^(2)=((1-cosA))/((1+cosA)).

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  19. Prove that (tanA)/((1-cotA))+(cotA)/((1-tanA))=(1+tanA+cotA).

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