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Let L be the line of intersection of t...

Let L be the line of intersection of the planes `2x""+""3y""+""z""=""1` and `x""+""3y""+""2z""=""2` . If L makes an angles ` alpha ` with the positive x-axis, then cos` alpha ` equals a.`1/(sqrt(3))` b. `1/2` c. 1 d.`1/(sqrt(2))`

A

`(1)/(sqrt(3))`

B

`(1)/(2)`

C

`1`

D

`(1)/(sqrt(2))`

Text Solution

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The correct Answer is:
(a)
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ARIHANT MATHS ENGLISH-THREE DIMENSIONAL COORDINATE SYSTEM-Exercise (Questions Asked In Previous 13 Years Exam)
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  7. Statement-I The point A(3, 1, 6) is the mirror image of the point B(1,...

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