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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 `cosalpha` 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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