Найду корень уравнения: tan(x)=1-x
tan(x) = 1 - x
x1 = -7.96506651297000
x2 = -1.90258165967000
x3 = -11.0781798144000
x4 = 0.479731007280000
x5 = 7.99595954345000
x6 = 2.24679137688000
x7 = 14.2127076381000