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Q.The angle between the planes 2x−y+z=62x - y + z = 6 and x+y+2z=7x + y + 2z = 7 is

a
cos⁡−1(1/3)\cos^{-1}(1/3)
b
sin⁡−1(1/3)\sin^{-1}(1/3)
c
cos⁡−1(4/9)\cos^{-1}(4/9)
d
cos⁡−1(1/9)\cos^{-1}(1/9)

Correct Answer: Option A

The correct solution involves applying the fundamental concept to derive the final value step by step...

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