Give the general solution of the differential equation p"+ 25 y =2 sec( 5 x) a) O y=C, sin(5 x) + C, cos( 5 x) + x cos( 5 x) + 25 cos( 5 x) In (cos(5 x)|) 2 b) O y=C, sin(5x) + C, cos( 5 x) +x sin (5 x) + sin (5 x) In(cos(5 x)|) 2 x sin (5 x) + 2 c) O y=C, sin(5 x) + C, cos( 5 x) + cos( 5 x) In(lcos( 5 x)|) 25 d) O y=C, e"+C,e° 5*+ sin(5 x) + 2 cos( 5 x) In (cos(5x)) -5x 25 e) O y-C, e* + C, e*+ sin( 5 x) + 2 sin (5x) In (cos(5 x)|) 25 f) None of the above.

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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**Question 1**

Give the general solution of the differential equation 

\[ y'' + 25y = 2 \sec(5x) \]

a) \( y = C_1 \sin(5x) + C_2 \cos(5x) + \frac{2}{5} x \cos(5x) + \frac{2}{25} \cos(5x) \ln(|\cos(5x)|) \)

b) \( y = C_1 \sin(5x) + C_2 \cos(5x) + \frac{2}{5} x \sin(5x) + \frac{2}{25} \sin(5x) \ln(|\cos(5x)|) \)

c) \( y = C_1 \sin(5x) + C_2 \cos(5x) + \frac{2}{5} x \sin(5x) + \frac{2}{25} \cos(5x) \ln(|\cos(5x)|) \)

d) \( y = C_1 e^{5x} + C_2 e^{-5x} + \frac{2}{5} \sin(5x) + \frac{2}{25} \cos(5x) \ln(|\cos(5x)|) \)

e) \( y = C_1 e^{5x} + C_2 e^{-5x} + \frac{2}{5} \sin(5x) + \frac{2}{25} \sin(5x) \ln(|\cos(5x)|) \)

f) \( \text{None of the above.} \)
Transcribed Image Text:**Question 1** Give the general solution of the differential equation \[ y'' + 25y = 2 \sec(5x) \] a) \( y = C_1 \sin(5x) + C_2 \cos(5x) + \frac{2}{5} x \cos(5x) + \frac{2}{25} \cos(5x) \ln(|\cos(5x)|) \) b) \( y = C_1 \sin(5x) + C_2 \cos(5x) + \frac{2}{5} x \sin(5x) + \frac{2}{25} \sin(5x) \ln(|\cos(5x)|) \) c) \( y = C_1 \sin(5x) + C_2 \cos(5x) + \frac{2}{5} x \sin(5x) + \frac{2}{25} \cos(5x) \ln(|\cos(5x)|) \) d) \( y = C_1 e^{5x} + C_2 e^{-5x} + \frac{2}{5} \sin(5x) + \frac{2}{25} \cos(5x) \ln(|\cos(5x)|) \) e) \( y = C_1 e^{5x} + C_2 e^{-5x} + \frac{2}{5} \sin(5x) + \frac{2}{25} \sin(5x) \ln(|\cos(5x)|) \) f) \( \text{None of the above.} \)
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