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

Let L be the line of intersection of the planes `2x + 3y + z = 1 and x + 3y + 2z = 2`. If L makes an angle `alpha` with the positive x-axis, then cos `alpha` equals

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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