3-d

Related Questions

• If direction cosines of two lines are proportional to (2, 3, –6) and (3, –4, 5), then the acute angle between them is

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• Distance between the points (1, 3, 2) and (2, 1, 3) is

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• The equation of the plane passing through (1, 1, 1) and (1, –1, –1) and perpendicular to $2x-y+z+5=0$ is

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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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• The angle between the straight lines $\frac{x-2}{2}=\frac{y-1}{5}=\frac{z+3}{-3}$and $\frac{x+1}{-1}=\frac{y-4}{8}=\frac{z-5}{4}$is

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