Question

If A is an orthogonal matrix if |A|= ……​

Answer 1

Answer:

Orthogonal matrix is a square matrix with real entities whose columns and rows are orthogonal unit vectors. ⇒AAT=I. Apply det on both sides , we get ∣A∣×∣AT∣=∣I∣ ⇒∣A∣2=1. ⇒∣A∣=±1.

Answer 2

Answer:

answer is option d ±1

Step-by-step explanation:

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