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Mathematics
Inverse of the matrix [ Cos 2 θ &-Sin 2θ Sin 2θ &Cos 2θ ] is ..........
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Q. Inverse of the matrix $\begin{bmatrix} {Cos 2 \theta }&{-Sin\, 2\theta }\\ {Sin\, 2\theta }&{Cos\, 2\theta}\\ \end{bmatrix}$ is ..........
KCET
KCET 2004
A
$\begin{bmatrix} {Cos 2 \theta }&{-Sin \theta }\\ {Sin \theta }&{Cos 2 \theta}\\ \end{bmatrix}$
15%
B
$\begin{bmatrix} {Cos 2 \theta }&{Sin \theta }\\ {Sin \theta }&{-Cos 2 \theta}\\ \end{bmatrix}$
15%
C
$\begin{bmatrix} {Cos 2 \theta }&{Sin 2\theta }\\ {Sin 2\theta }&{Cos 2 \theta}\\ \end{bmatrix}$
4%
D
None of These
67%
Solution:
Correct answer is (d) None of These