3-d

Related Questions

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• If the planes $3x-2y+2z+17=0$ and $4x+3y-kz=25$ are mutually perpendicular , then $k=$

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• If a line makes angles $\alpha ,\beta ,\gamma ,\delta $ with four diagonals of a cube, then the value of ${{\sin }^{2}}\alpha +{{\sin }^{2}}\beta +$ ${{\sin }^{2}}\gamma +{{\sin }^{2}}\delta $ is

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