Найду корень уравнения: cos(x/3)=0
с изменением знака при 0
3*pi x1 = ---- 2
9*pi x2 = ---- 2
x1 = -51.8362787842316
x2 = -42.4115008234622
x3 = -32.9867228626928
x4 = 42.4115008234622
x5 = -4.71238898038469
x6 = -80.1106126665397
x7 = 80.1106126665397
x8 = 4.71238898038469
x9 = 89.5353906273091
x10 = 23.5619449019235
x11 = -98.9601685880785
x12 = 155.508836352695
x13 = 98.9601685880785
x14 = -249.756615960389
x15 = -70.6858347057703
x16 = -14.1371669411541
x17 = 14.1371669411541
x18 = 2653.07499595658
x19 = -89.5353906273091
x20 = 70.6858347057703
x21 = -4867.89781673738
x22 = -61.261056745001
x23 = 61.261056745001
x24 = 5659.57916544201
x25 = 51.8362787842316
x26 = -23.5619449019235
x27 = 32.9867228626928