please answer this maths trignometry
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I have explained it on paper
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LHS
(sinA+cosA)^2 + (sinA-cosA)^2
sin^2A+cos^2A+2sinAcosA + sin^2A+cos^2A-2sinAcosA
sin^2A+ cos^2A + sin^2A+cos^2A
1 + 1 (since sin^2A+ cos^2A = 1)
2
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