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Prove the following identities: (sinA+se...

Prove the following identities: `(sinA+secA)^2+(cos"A"+"c o s e cA")^2=(1+secAcos e cA)^2` `cot^2A((secA-1)/(1+sinA))+sec^2A((sinA-1)/(1+secA))=0`

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