Question

Prove that
(sinA +cosA)/(sinA-cosA)+(sinA-cosA)/(sinA+cosA)=2/(sin²A-cos²A)=2/(2sin²A-1)=2/(1-2cos²A)​

Answer 1

Step-by-step explanation:

2/2sin^2A-1=2/1-2cos^2A

Identity cos2x=2sin^2A-1=1-2cos^2A

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