(. . 2) ,
11 + ω02 = α2 (90)
() . , . = 1 + 2, 1 2
1 11 + ω021 = 0, 2 11 + ω022 = α1 2.
a x1 = a cos ω0t, a . x1 , x2 (t), x1 (t) 2 ω0.
. 22. , .
, , , - (), .
x(t) = cos(ωi t - jI). (91)
.
, , , ..
x = cos(ωt - j),
, , , n:
= (1 + cosn t). (92)
ω, ω + n, ω - n , . , , . . . , . , : , , .. . .
, .
. , . , , , . , x(t) = A(ω1t) cos (ω2t), ω1 << ω2, . : , .