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JEE Main 2001Medium

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

a
cos⁡−1(1/3)\cos^{-1}(1/3)
b
cos⁡−1(2/3)\cos^{-1}(2/3)
c
cos⁡−1(1/3)\cos^{-1}(1/\sqrt{3})
d
cos⁡−1(2/3)\cos^{-1}(2/\sqrt{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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