文档介绍：-1
x12(t)cost,x(tt)sin
x(t)cos10tut()
x(t)tut()
x1(t)cos10tu(t),x21(t)cos5tu(t),x(t)xt2()0
-2
1T /2 2 1/10 125 1/10
px(t)dt5(5cos(10t))2dt [1cos(20t)]dt
T T /2 0 2 0
Ex(t)2dt(8e4tt)28dt648edt
00
5sin2tT1 2/2110sin3tT22/32/3
xt()
11TT/2 2 /2
px()tdt{[5sin(2t)]22[10sin(3t)]}dt
TTTT/2 /2
1TT/2 25 1/2100
[1cos(4t)]dt[1cos(6t)]dt
TTTT/2 22/2
1
cos t sin t
00 2 0
11T0 /2 2
cos 0tdt
T0 /2
T0 2
11
P
22
-3
-4
(1)
x()ttt0xt00tt
xttt00xtttxt0tt0
xttt0xt00ttxttt0
x(t)(tt000)x(t)()tt
xttt0xt0tt0x()t00tt
2
xttt0 dtxt0tt0dtx()t00ttdt
xt0tt0x()t00ttdt
xt()0
-5
x(tt00)(t)x(tt)()
cos1t
()(tt)()
t222
t 0
[ecos(3tt60)]() 1
()t
2
11
(3)(3)
jj232
sin k
()() kSa(kk)()()
d
[et(t)]ett(t)et()
dt
(t)(t)et(tt)()
ddd
2[et (t)][e0(t)][(tt)]()
dtdtdt
7 ()x()tdx()t
8
2
et (t3)dt
4 e 3
et sint(t1)dt
9 0 =0
(10)
(t2 4)dt[(t2)(t2)]dt
0