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x in (-oo:+oo)
sin(x-(3.14/4)) = 0
sin(x-0.785) = 0
sin(x-(3.14/4)) = 0 <=> x-(3.14/4) = pi*k_1 i k_1 należy do I
t_1 = pi*k_1
x-t_1-(3.14/4) = 0
x-t_1-0.785 = 0
x-t_1-0.785 = 0 // + -t_1-0.785
x = -(-t_1-0.785)
x = t_1+0.785
x = pi*k_1+0.785 i k_1 należy do I
x = pi*k_1+0.785
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