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The angle between the pair of planes rep...

The angle between the pair of planes represented by equation `2x^2-2y^2+4z^2+6zx+2yz+3xy=0` is

A

`cos^(-1)((1)/(3))`

B

`cos^(-1)((4)/(21))`

C

`cos^(-1)((4)/(9))`

D

`cos^(-1)((7)/(sqrt(84)))`

Text Solution

Verified by Experts

The correct Answer is:
(c)
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ARIHANT MATHS-THREE DIMENSIONAL COORDINATE SYSTEM-Exercise (Single Option Correct Type Questions)
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  9. A plane cutting the axes in P, Q, R passes through (alpha-beta, beta-g...

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  10. The shortest distance between any two opposite edges of the tetrahedro...

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  11. The angle between the pair of planes represented by equation 2x^2-2y^2...

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  12. Let (p, q, r) be a point on the plane 2x+2y+z=6, then the least value ...

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  13. The fout lines drawing from the vertices of any tetrahedron to the cen...

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  14. The shorteast distance from (1, 1, 1) to the line of intersection of t...

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  15. The shortest distance between the two lines L1:x=k1, y=k2 and L2: x=k3...

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  16. A=[{:(l(1),m(1),n(1)),(l(2),m(2),n(2)),(l(3),m(3),n(3)):}] and B=[{:(p...

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  17. If ABCD is a tetrahedron such that each triangleABC, triangleABD and t...

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  18. In a regular tetrahedron, if the distance between the mid points of op...

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  19. A variable plane makes intercepts on X, Y and Z-axes and it makes a t...

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  20. If P, Q, R, S are four coplanar points on the sides AB, BC, CD, DA of ...

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