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

Find a Lapalce transformation of

[tex] cos^2t[/tex]

2. Relevant equations

3. The attempt at a solution

started like this

[tex]\mathcal{L}(s)=\int_0^{\infty} e^{-st}\cos^2t\mbox{d}t=\frac{1}{2}\int_0^{\infty}e^{-st}(\cos 2t+1)\mbox{d}t=\frac{1}{2}\int_0^{\infty}e^{-st}\cos 2t\mbox{d}t+\frac{1}{2}\int_0^{\infty}e^{-st}\mbox{d}t=...[/tex]

but i wonder how much the last integral is going to be?

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

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# Homework Help: Lapalce transformation

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