8 cos^2 x/2+ 6 sin x/2-3=0

8-8sinx/2+6sinx/2-3=0sinx/2=a8a²-6a-5=0D=36+160=196a1=(6-14)/16=-0,75⇒sinx=-0,75⇒x=(-1)^(n+1)*arsin0,75+πn,n∈za2=(6+14)/16=1,25⇒sinx=1,25>1 нет решения