3+4*sin(2x+1)=0 тригонометрические уравнение
3Sin(2x+1) = -3 Sin(2x+1) = -3/4 2x +1 = (-1)^n arcSin(-3/4) + nπ, n∈Z 2x +1 = (-1)^(n+1) arcSin3/4 + nπ, n ∈Z 2x =( -1)^(n+1) arcSin3/4 + nπ +1 , n ∈Z x = (-1)^(n+1)·1/2·arcSin3/4 +nπ/2 +1/2, n∈Z