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Find:y" + a2y = Cos ax |
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Answer» y11 + a2y = cos ax It's complementary equation is: m2 + a2 = 0 ⇒ m = \(\pm ac\) \(\therefore\) C. F. = C1 cos ax + C2 sin ax P.I. = \(\frac{1}{D^2+a^2}cos\,ax=\frac{x}{2a}sin\,ax\) \(\therefore\) Complete solution of given differential equation is y = C.F. + P.I. = C1 cos ax + C2 sin ax + x/2a sin ax |
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