1.) dx dt + 7x = 5 cos 2t 2 ← Equation 1

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Hello, Please EXPLAIN THIS SOLUTION USING ONLY WORDS SO I CAN UNDERSTAND IT BETTER. Thank You. Hoping you will answer it the way i asked.

example: in the first part of this diffetential equation, we should get the .............

 

.
1.) dx
dt
Equation 1
dx
dt
+ 7x = 5 cos 2t
2
+ P(t) x =
=
Here PCt) = 7 and Q(t) = 5 cos 12 (t)
has the form
• For the integrating factor I.F
I-F= e Sfutjat
estat
(F-F) X
at)
•
• The general solution
We know that
Sf (t) g(t) at
← Equation 1
751xdt
2 e
- SCI-F.).
7t
⇒ [= coszt
is given by
F.) x Q (t) dt + C; Where Cis
constant
ने
est. x-fe²t. 5 cos 26 db + c
2t
ezt
s fest
S
Let I = √e²tx cos (26) 06
Sezt
x cos (2) dt + c
then let f(t) = cos (2+), g(t) = e7t
• Now
←
I= zt
cos 2+ Sett dt - Sa cos 2+ (feat at ) dt
7t
26
ext
df
f(t) Sgutidt :- Salf
- Solf (Sght) ott) dt
dt
•
ezt -S(-2sınzt).
7
#
an arbitrary
Equation (2)
dt
Transcribed Image Text:. 1.) dx dt Equation 1 dx dt + 7x = 5 cos 2t 2 + P(t) x = = Here PCt) = 7 and Q(t) = 5 cos 12 (t) has the form • For the integrating factor I.F I-F= e Sfutjat estat (F-F) X at) • • The general solution We know that Sf (t) g(t) at ← Equation 1 751xdt 2 e - SCI-F.). 7t ⇒ [= coszt is given by F.) x Q (t) dt + C; Where Cis constant ने est. x-fe²t. 5 cos 26 db + c 2t ezt s fest S Let I = √e²tx cos (26) 06 Sezt x cos (2) dt + c then let f(t) = cos (2+), g(t) = e7t • Now ← I= zt cos 2+ Sett dt - Sa cos 2+ (feat at ) dt 7t 26 ext df f(t) Sgutidt :- Salf - Solf (Sght) ott) dt dt • ezt -S(-2sınzt). 7 # an arbitrary Equation (2) dt
크
M
✔
=
ㅗ
(1
e
53
커
99
fent, cos(t) +죽 [ancet), 딸
ㅗt
구
즉 [gin(2t)
et
구
I eft
=> I
cos 25
det, cor(it) 가죽co.net -를 즐 feat.
*cos ㅏ
san 2t
19
Se
t
⇒ I = 99
53
=
+
टात
5
Sett sin (24) dt
en
) (+2) = (Acos2t + 2sin2t)et
99
49
53
cos (2t) + 스
49
●
e
7t
sinzt
-
using equanon 2
5[ㅎㅋ
[ㄶ (Acos2t +2 sin
(7cos 2t + 2sinet) et
거
99
ㅗ (7cos 2t't 2sin 2t) est
53
- Scost at
es
dt
구
쉐
(7cos 2t +2 sın 2t)et
I
ztjet]tc
(Acos2t tisin 2t) tee-t
+
CHROMATR>
Changsen
S
cus 2t alt
Transcribed Image Text:크 M ✔ = ㅗ (1 e 53 커 99 fent, cos(t) +죽 [ancet), 딸 ㅗt 구 즉 [gin(2t) et 구 I eft => I cos 25 det, cor(it) 가죽co.net -를 즐 feat. *cos ㅏ san 2t 19 Se t ⇒ I = 99 53 = + टात 5 Sett sin (24) dt en ) (+2) = (Acos2t + 2sin2t)et 99 49 53 cos (2t) + 스 49 ● e 7t sinzt - using equanon 2 5[ㅎㅋ [ㄶ (Acos2t +2 sin (7cos 2t + 2sinet) et 거 99 ㅗ (7cos 2t't 2sin 2t) est 53 - Scost at es dt 구 쉐 (7cos 2t +2 sın 2t)et I ztjet]tc (Acos2t tisin 2t) tee-t + CHROMATR> Changsen S cus 2t alt
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