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Problem 예제.

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라플라스 변환

라플라스 변환

$\mathcal{L} \left[ \dfrac{d}{dt} \cos \omega t \right]$ 의 값은?

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$\dfrac{-s^2}{s^2+\omega^2}$

$\dfrac{\omega^2}{s^2+\omega^2}$

$\dfrac{s^2}{s^2+\omega^2}$

$\dfrac{-\omega^2}{s^2+\omega^2}$

Solution

$\mathcal{L}(\dfrac{d \cos \omega t}{dt})=s \mathcal{L}(\cos \omega t) - \cos (\omega 0) = \dfrac{s^2}{s^2+\omega^2}-1 = \dfrac{-\omega^2}{s^2+\omega^2}$

Correct answer: 4

예제.

Problem 예제.

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