(adsbygoogle = window.adsbygoogle || []).push({}); Explanation on how these solutions can be "easily" seen

1. The problem statement, all variables and given/known data

Show that x_{1}(t)=cos(t) and x_{2}(t)=sin(t) are both solutions to the following Equation.

2. Relevant equations

(d^{2}x/dt^{2}) + x = 0

3. The attempt at a solution

Ok, So I just cannot understand how this can easily be seen! I cannot see it at all!

I know I haven't got any work to show you and that is wrong but I honestly do not know where to start with this.

It is in the middle of some lecture notes and all they say is "this can easily be seen"

Please Help this dummy!:'(

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# Homework Help: Explanation on how these solutions can be easily seen

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