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The angle between the planes 2x + y - z ...

The angle between the planes 2x + y - z = 9 and x + 2y + z = 7 is …………

A

`cos^(-1)(5//6)`

B

`cos^(-1)(5//36)`

C

`cos^(-1)(1//2)`

D

`cos^(-1)(1//12)`

Text Solution

Verified by Experts

The correct Answer is:
A, B, C
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Knowledge Check

  • The distance between the planes x + 2y + 3z + 7 = 0 and 2x + 4y + 6z + 7 0 is

    A
    `(sqrt7)/(2sqrt2)`
    B
    `(7)/(2)`
    C
    `(sqrt7)/(2)`
    D
    `(7)/(2sqrt(2))`

  • The distance between the planes x + 2y + 3z + 7 = 0 and 2x + 4y + 6z + 7 = 0 is

    A
    `(sqrt(7))/(2sqrt(2))`
    B
    `(7)/(2sqrt(14))`
    C
    `(sqrt(7))/(2)`
    D
    `(7)/(2sqrt(2))`

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