Q2.6MCQMarks unknownThe matrices [cosθ−sinθsinθcosθ]\begin{bmatrix} \cos\theta && -\sin\theta \\ \sin\theta && \cos\theta \end{bmatrix}[cosθsinθ−sinθcosθ] and [a00b]\begin{bmatrix} a && 0\\ 0&& b \end{bmatrix}[a00b] commute under multiplication(A)if a=b or θ=nπ,na=b \text{ or } \theta = n\pi, na=b or θ=nπ,n an integer(B)always(C)never(D)if acosθ=bsinθa \cos\theta = b \sin\thetaacosθ=bsinθSign in to save attempts.Show answer← PreviousNext →SolutionsDiscussionLoading…Sign in with Google