(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Find a particular solution for these second order differential equations.

2. Relevant equations

1) y''+9y=tan3t

2) y''+y=tan^2t

3. The attempt at a solution

I want to find a fundamental solutions y1 and y2 cuz I want to find a particular solution like this y=v1*y1+v2*y2, but i don't know how to get them.

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# Homework Help: Inhomogeneous equations: Variation of Parameters

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