- #1
peace-Econ
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Homework Statement
Find a particular solution for these second order differential equations.
Homework Equations
1) y''+9y=tan3t
2) y''+y=tan^2t
The Attempt at a Solution
I want to find a fundamental solutions y1 and y2 because I want to find a particular solution like this y=v1*y1+v2*y2, but i don't know how to get them.