Evaluate the determinants:

\(\begin{bmatrix}cos\theta &-sin\theta \\[0.3em] sin\theta & cos\theta \\[0.3em] \end{bmatrix}\)

Asked by Aaryan | 1 year ago |  127

1 Answer

Solution :-

 |A| = cos θ × cos θ – (–sin θ) x sin θ

|A| = cos2θ + sin2θ

We know that cos2θ + sin2θ = 1

|A| = 1

Answered by Sakshi | 1 year ago

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