1.
If f(x)=∣2cos⁡x10π2−x2cos⁡x1012cos⁡x∣f(x) = \begin{vmatrix} 2\cos x & 1 & 0 \\ \frac{\pi}{2} - x & 2\cos x & 1 \\ 0 & 1 & 2\cos x \end{vmatrix}, then f′(π)f'(\pi) is equal to