Maths-

General

Easy

Question

# If k is an orthogonal matrix then k is equal to

- 1
- 1/3
- ½
- none of these

## The correct answer is: 1/3

### since A is orthogonal AA^{T} = I

k^{2 } = I

k^{2} = I

9k^{2}I = I k = ± 1/3

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