if A is an acute angle and sin A = cos A, find the value of 2 tan^2 A + sin^2 A - 1
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A=π/4
2tan^2π/4+sin^2π/4-1=2(1)+1/2-1=3/2
2tan^2π/4+sin^2π/4-1=2(1)+1/2-1=3/2
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I have taken A=theta
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