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x in (-oo:+oo)
((2*sin(2*x))/2)*sin(x) = 0
(2*sin(2*x))/2 = 0
(2*sin(2*x))/2 = 0 // * 2
2*sin(2*x) = 0
sin(2*x) = 0
sin(2*x) = 0 <=> 2*x = pi*k_1 i k_1 należy do I
t_1 = pi*k_1
2*x-t_1 = 0
2*x-t_1 = 0 // + t_1
2*x = t_1 // : 2
x = t_1/2
x = pi*k_1/2 i k_1 należy do I
2*sin(2*x) = 0 <=> 2 = 0 or 2*sin(2*x) = 0 <=> sin(2*x) = 0
sin(x) = 0
sin(x) = 0 <=> x = pi*k_2 i k_2 należy do I
t_2 = pi*k_2
x-t_2 = 0
x-t_2 = 0 // + t_2
x = t_2
x = pi*k_2 i k_2 należy do I
((2*sin(2*x))/2)*sin(x) = 0 <=> (2*sin(2*x))/2 = 0 or ((2*sin(2*x))/2)*sin(x) = 0 <=> sin(x) = 0
x in { pi*k_1/2, pi*k_2 }
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