If \[C=2cos\theta ,\] then the value of the determinant\[\Delta =\left[ \begin{matrix} C & 1 & 0 \\ 1 & C & 1 \\ 6 & 1 & C \\ \end{matrix} \right]\] is

\[\frac{2\sin 2\theta }{\sin \theta }\]

\[\frac{2{{\sin }^{2}}2\theta }{\sin \theta }\]

\[8{{\cos }^{3}}\theta -4\cos \theta +6\]

\[8{{\cos }^{3}}\theta +4\cos \theta +6\]

If \[C=2cos\theta ,\] then the value of the determinant\[\Delta =\left

1.	If \[C=2cos\theta ,\] then the value of the determinant\[\Delta =\left[ \begin{matrix} C & 1 & 0 \\ 1 & C & 1 \\ 6 & 1 & C \\ \end{matrix} \right]\] is
A.	\[\frac{2{{\sin }^{2}}2\theta }{\sin \theta }\]
B.	\[8{{\cos }^{3}}\theta -4\cos \theta +6\]
C.	\[\frac{2\sin 2\theta }{\sin \theta }\]
D.	\[8{{\cos }^{3}}\theta +4\cos \theta +6\]
Answer» C. \[\frac{2\sin 2\theta }{\sin \theta }\]

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If \[C=2cos\theta ,\] then the value of the determinant\[\Delta =\left[ \begin{matrix} C & 1 & 0 \\ 1 & C & 1 \\ 6 & 1 & C \\ \end{matrix} \right]\] is

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