x=Пk/2
Пошаговое объяснение:
sin2x<=0
П+2Пk<=2x<=2П+2Пk
П/2+Пk<=x<=П+Пk
tgx>=0
Пk<=x<=П/2+Пk
{П/2+Пk<=x<=П+Пk
{Пk<=x<=П/2+Пk
x=Пk/2
Пошаговое объяснение:
sin2x<=0
П+2Пk<=2x<=2П+2Пk
П/2+Пk<=x<=П+Пk
tgx>=0
Пk<=x<=П/2+Пk
{П/2+Пk<=x<=П+Пk
{Пk<=x<=П/2+Пk
x=Пk/2