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Mathematics
Mathematics
Problem
Evaluate
∣
2
cos
θ
−
2
sin
θ
sin
θ
cos
θ
∣
.
\begin{vmatrix} 2\cos \theta & -2\sin \theta \\ \sin \theta & \cos \theta \end{vmatrix}.
2
cos
θ
sin
θ
−
2
sin
θ
cos
θ
.
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