If the curve satisfying \( y y_{1} \sin x=\cos x(\sin x \) \( \left.-y^{2}\right) \) passes thro...

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If the curve satisfying \( y y_{1} \sin x=\cos x(\sin x \) \( \left.-y^{2}\right) \) passes through \( (\pi / 2,2) \) then the value of \( 3(y(\pi / 6))^{2}-38 \) is
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