8-8sin^2x-12sinx+7=0
8sin^2x+12sinx-15=0
(-6+-sqrt(36+120))/8=(-6+-sqrt(156))/8
sinx=(sqrt(156)-6)/8
x=arcsin(sqrt(156)-6)/8)+2Пk
8-8sin^2x-12sinx+7=0
8sin^2x+12sinx-15=0
(-6+-sqrt(36+120))/8=(-6+-sqrt(156))/8
sinx=(sqrt(156)-6)/8
x=arcsin(sqrt(156)-6)/8)+2Пk