For \[y''+y'-2y=sinx\]
\[y_p=Acosx+Bsinx\]
why is it incorrect to guess:
\[y_p=Asinx\]

For \[y''+y'-2y=sinx\]
\[y_p=Acosx+Bsinx\]
why is it incorrect to guess:
\[y_p=Asinx\]

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y_p doesn't contain constants of integration.

@experimentX , what do you mean by that?

what's the difference between solution of
\( y''+y'-2y=0 \) and \( y''+y'-2y=\sin x \)

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