pls help me!!solution for y''+y=sec x tan^2x by variation of parameters

Question

turingtest · Answer

got the homogeneous yet?

turingtest · Answer

ok, message received...
now, do you have the complimentary solution yet?

turingtest · Answer

y''+y=0
the solution to this is the complimentary solution
what is it?

anonymous · Answer

i dont have yet

anonymous · Answer

can you pls answer that for me pls sensei

turingtest · Answer

if you have no idea how to solve y''+y=0 we are going to have a very hard time doing this problem :/

turingtest · Answer

ever heard of the associated polynomial?
r^2+r=0
?

anonymous · Answer

because its for my exam tommorow

anonymous · Answer

nope

anonymous · Answer

can you answer it for me pls..

turingtest · Answer

then I don't think you can pass it unless you do a LOT of studying today

do you know what I mean by the characteristic polynomial, which in this case is 
r^2+r=0
?

across · Answer

If you have an exam tomorrow, then I would $\text{seriously}$ recommend that you make an effort to understand this problem—not obtain a solution for it.

anonymous · Answer

but this is a bring home exam pls! just for this question pls

turingtest · Answer

I will not just do the problem for you.
do you what what a characteristic polynomial is?
do you know what a complimentary solution is?

anonymous · Answer

huhuhuhuhuhu

across · Answer

elsondibz, TuringTest can solve this problem in the blink of an eye, and he will be willing to help you solve this problem only if you are willing to cooperate. :)

anonymous · Answer

plss plss turing test...