1.
The value of ∣sin⁡214∘sin⁡266∘tan⁡135∘sin⁡266∘tan⁡135∘sin⁡214∘tan⁡135∘sin⁡214∘sin⁡266∘∣\begin{vmatrix} \sin^2 14^\circ & \sin^2 66^\circ & \tan 135^\circ \\ \sin^2 66^\circ & \tan 135^\circ & \sin^2 14^\circ \\ \tan 135^\circ & \sin^2 14^\circ & \sin^2 66^\circ \end{vmatrix} is