\[
\left|\begin{array}{ccc}
1+\sin ^{2} \theta & \sin ^{2} \theta &...
\[
\left|\begin{array}{ccc}
1+\sin ^{2} \theta & \sin ^{2} \theta & \sin ^{2} \theta \\
\cos ^{2} \theta & 1+\cos ^{2} \theta & \cos ^{2} \theta \\
4 \sin 4 \theta & 4 \sin 4 \theta & 1+4 \sin 4 \theta
\end{array}\right|=0
\]
P
W.
then \( \sin 4 \theta \) equal to
(1) \( 1 / 2 \)
(2) 1
(3) \( -1 / 2 \)
(4) \( -1 \)
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