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JEE Main 2007Medium

Q.The angle between the planes x+y+z=1x + y + z = 1 and 2x+3y−z=52x + 3y - z = 5 is

a
cos⁡−1(4/42)\cos^{-1}(4/\sqrt{42})
b
cos⁡−1(1/3)\cos^{-1}(1/\sqrt{3})
c
cos⁡−1(4/30)\cos^{-1}(4/\sqrt{30})
d
cos⁡−1(1/3)\cos^{-1}(1/3)

Correct Answer: Option A

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

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