Inhomogenous differential equation of second order

Chromosom
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Homework Statement



y^{\prime\prime}+y=\frac{1}{\sin x}


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The Attempt at a Solution



I solved the homogenous equation: y=C_1\sin x+C_2\cos x, and then I tried to use method of variable the constant. But the equation system is rather hard. Do you know any other method that can be used here?
 
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The method of variation of constants works well. Show what you have done.

ehild
 
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Yeah, it does. Thanks for your answer. I started to calculate it and I got it. For future visitors: you must multiplicate first equation by \cos x and second by \sin x and try to reduce it.
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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