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Prove that the measure of the angle betw...

Prove that the measure of the angle between two main diagonals of a cube is `cos^(-1)frac[1][3]`.

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SHARAM PUBLICATION-THREE DIMENSIONAL GEOMETRY-EXAMPLE
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  2. Find the perpendicular distance of the point (-1,3,9) from the line (x...

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  3. Prove that the measure of the angle between two main diagonals of a cu...

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  4. If P (1,y,z) lies on the line through (3,2,-1) and (-4,6,3) find y & z...

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  10. Find the image of the point (2,-1,3) in the plane 3x-2y+z-9=0

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  11. Find the image of the point (-2,0,3) with respect to the plane y = 3.

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  13. Find the point where the line (x-2)/1=y/(-1)=(z-1)/2 meets the plane 2...

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  14. The angle between the plane 3x+3z-5=0 and the line (x-1)/1=(y-2)/-1=(z...

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  15. Find the equation of the plane passing through the line x = y = z and ...

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  16. Find the equation of the plane which passes through (1, 1, 2) and par...

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  17. Bisecting the line segment joining (-1,4,3) and (5,-2,-1) at right ang...

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  19. Find the number of points (x, y, z) in space other than the point (1,-...

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  20. Write the equation of the plane passing through (3,-6,-9) and parallel...

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