3-d

Related Questions

• If line $\frac{x-{{x}_{1}}}{l}=\frac{y-{{y}_{1}}}{m}=\frac{z-{{z}_{1}}}{n}$ is parallel to the plane $ax+by+cz+d=0$, then

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• If the co-ordinates of the points $A,B,C,D$ be (2, 3, –1), (3, 5, – 3), (1, 2, 3) and (3, 5, 7) respectively, then the projection of $AB$ on $CD$ is

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• The direction cosines of three lines passing through the origin are ${{l}_{1}},{{m}_{1}},{{n}_{1}};\,{{l}_{2}},{{m}_{2}},{{n}_{2}}$and ${{l}_{3}},{{m}_{3}},{{n}_{3}}$. The lines will be coplanar, if

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• A plane which passes through the point (3, 2, 0) and the line $\frac{x-3}{1}=\frac{y-6}{5}=\frac{z-4}{4}$is

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• If the plane $2ax-3ay+4az+6=0$ passes through the midpoint of the line joining the centres of the spheres ${{x}^{2}}+{{y}^{2}}+{{z}^{2}}+6x-8y-2z=13$ and ${{x}^{2}}+{{y}^{2}}+{{z}^{2}}-10x+4y-2z=8$, then $a$ equals

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