5sin^2 x-3+5cos^2 x=5sin^2 x-3+5(1-sin^2 x)=5sin^2 x-3+5-5sin^2 x)=2
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5sin^2 x-3+5cos^2 x=5sin^2 x-3+5(1-sin^2 x)=5sin^2 x-3+5-5sin^2 x)=2