Question

Pls help:)
Find the particular integral of
(D^2+a^2)y=sinax
a)successive integration
b)using partial fraction

Answer 1

y=Asin(ax)+Bcos(ax)
find y' and y''

Answer 2

y'=Aacos(ax)-Basin(ax)
y"=-Aa^2sin(ax)-Ba^2cos(ax)

Answer 3

what do i do after this @abb0t

Answer 4

@hartnn @amistre64

Answer 5

@campbell_st

Answer 6

now, you plug it in for your second derivative and solve. your particular integral is any function which when substituted into the left hand side and simplified, results in the function on the right.