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If A = [(1,2), (-1, 4)] and theta be the...

If `A = [(1,2), (-1, 4)]` and `theta` be the angle between the two non-zero column vectors `X` such that `AX = lambda X` for some scalar `lambda,` then `9 sec^2 theta` is equal to

A

13

B

12

C

11

D

10

Text Solution

Verified by Experts

The correct Answer is:
D
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