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x in (-oo:+oo)
(-1/3)*sin(3.14-((2*x)/5)) = 0
(-1/3)*sin((-2/5)*x+3.14) = 0
-1/3 = 0
-1/3 = 0 // * 3
-1 = 0
sin(3.14-((2*x)/5)) = 0
sin((-2/5)*x+3.14) = 0
sin(3.14-((2*x)/5)) = 0 <=> 3.14-((2*x)/5) = pi*k_1 i k_1 należy do I
t_1 = pi*k_1
3.14-t_1-((2*x)/5) = 0
(-2/5)*x-t_1+3.14 = 0
3.14-t_1-2/5*x = 0 // - 3.14-t_1
-2/5*x = -(3.14-t_1) // : -2/5
x = (-(3.14-t_1))/(-2/5)
x = -5/2*(t_1-3.14)
x = -5/2*(pi*k_1-3.14) i k_1 należy do I
(-1/3)*sin(3.14-((2*x)/5)) = 0 <=> -1/3 = 0 or (-1/3)*sin(3.14-((2*x)/5)) = 0 <=> sin(3.14-((2*x)/5)) = 0
x = -5/2*(pi*k_1-3.14)
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