\(\Leftrightarrow\frac{\sqrt{3}-1}{2\sqrt{2}}sinx-\frac{\sqrt{3}+1}{2\sqrt{2}}cosx=-\frac{\sqrt{3}-1}{2}\)
\(\Leftrightarrow sinx.cos\left(\frac{5\pi}{12}\right)-cosx.sin\left(\frac{5\pi}{12}\right)=-cos\left(\frac{5\pi}{12}\right)\)
\(\Leftrightarrow sin\left(x-\frac{5\pi}{12}\right)=sin\left(-\frac{\pi}{12}\right)\)
\(\Leftrightarrow\left[{}\begin{matrix}x-\frac{5\pi}{12}=-\frac{\pi}{12}+k2\pi\\x-\frac{5\pi}{12}=\frac{13\pi}{12}+k2\pi\end{matrix}\right.\)
\(\Leftrightarrow...\)