x=0
" alt="1) ( \sqrt{2} sin^2x + cosx- \sqrt{2} )* \sqrt{-6sinx} =0
(\sqrt{2} (sin^2x-1)+cosx)*\sqrt{-6sinx} =0
(-\sqrt{2} cos^2x+cosx)* \sqrt{-6sinx} =0 =\ \textgreater \
-\sqrt{2} cos^2x=cosx=0 ; \sqrt{-6sinx} =0 =\ \textgreater \
cosx=0;cosx= \sqrt{2} /2;sinx=0; sinx \leq 0 =>
x=0
" align="absmiddle" class="latex-formula">