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Prove the following identities: (sin+co...

Prove the following identities: `(sin+cosA)/(sinA-cosA)+(sin-cosA)/(sinA+cosA)=2/(sin^2A-cos^2A)=2/(2sin^2A-1)=2/(1-2cos^2A)`

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RD SHARMA-TRIGONOMETRIC IDENTITIES-All Questions
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