Question

развяжите уравнение sin2x= - 1/2

Answer 1

sin2x=-1/2
2x=(-1)^k*arcsin(-1/2)+πk
2x=(-1)^k*(-π/6)+πk
x=-(-1)^(k+1)π/3+πk/2 ;k€Z

Answer 2

надо х=(-1)^(k+1)*π/12+πk/2