Решите уравнение 2cos^2x +(2- √2)sinx+√2-2=0

Решите задачу:

$2\cos^2x +(2- \sqrt{2} )\sin x+ \sqrt{2} -2=0$
$2-2\sin^2x +(2- \sqrt{2} )\sin x+ \sqrt{2} -2=0$
$-2\sin^2x +(2- \sqrt{2} )\sin x+ \sqrt{2} =0$
$2\sin^2x -( 2-\sqrt{2} )\sin x- \sqrt{2} =0$
$2\sin^2x - 2\sin x+\sqrt{2} \sin x- \sqrt{2} =0$
$2\sin x(\sin x - 1)+\sqrt{2} (\sin x-1)=0$
$(\sin x - 1)(2\sin x+\sqrt{2})=0$
$\left[\begin{array}{l} \sin x - 1=0 \\ 2\sin x+\sqrt{2}=0 \end{array}$
$\left[\begin{array}{l} \sin x = 1 \\ \sin x=- \frac{ \sqrt{2} }{2} \end{array}$
$\left[\begin{array}{l} x_1 = \frac{ \pi }{2}+2 \pi n, \ n\in Z \\ x_2=(-1)^{k+1} \frac{ \pi }{4}+ \pi k, \ k\in Z \end{array}$