GUJCET 2019 Math Solved Paper

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Question : 29 of 40
 
Marks: +1, -0
The measure of the angle between the line
r
= ( 2, -3, 1) + k(2,2,1 ); k ∊ R and the plane 2x – 2y + z + 7 = 0 is ……….. .
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