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If
Δ
=
∣
1
3
cos
θ
1
sin
θ
1
3
cos
θ
1
sin
θ
1
∣
\Delta = \begin{vmatrix} 1 & 3 \cos \theta & 1 \\ \sin \theta & 1 & 3 \cos \theta \\ 1 & \sin \theta & 1 \end{vmatrix}
Δ
=
1
sin
θ
1
3
cos
θ
1
sin
θ
1
3
cos
θ
1
…
Mathematics
Problem
If
Δ
=
∣
1
3
cos
θ
1
sin
θ
1
3
cos
θ
1
sin
θ
1
∣
\Delta = \begin{vmatrix} 1 & 3 \cos \theta & 1 \\ \sin \theta & 1 & 3 \cos \theta \\ 1 & \sin \theta & 1 \end{vmatrix}
Δ
=
1
sin
θ
1
3
cos
θ
1
sin
θ
1
3
cos
θ
1
, the maximum value of
Δ
\Delta
Δ
is a. -10 b.
−
10
-\sqrt{10}
−
10
c.
10
\sqrt{10}
10
d. 10
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