Questions
Let ‘L’ be the line of intersection of the planes and , if L makes an angle with positive axis, then equals.
a
13
b
12
c
-1
d
12
detailed solution
Correct option is A
The given planes are 2x+3y+z=1 and x+3y+2z=2The line of intersection of those two planes is along the vector n¯=ijk231132=i3-j3+k3Hence, the direction ratios of the line of intersection of two planes is ⟨1,−1,1⟩The angle made by the line with x- axis is α then cosα=±13Talk to our academic expert!
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