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sin2t=1−cos2t2 를 이용한다.
sin2Ω0t는 다음과 같이 전개가 가능함.
sin2(Ω0t)=1−cos2Ω0t2=12−12cos2Ω0t
이를 (Unilateral )Laplace transform하면 다음과 같음.
L[sin2Ω0t]=L[12]−L[12cos2Ω0t]=12L[1]−12L[cos2Ω0t]=121s−12ss2+(2Ω0)2=12s−s2s2+2(2Ω0)2={2s2+2(2Ω0)2}−2s2(2s){2s2+2(2Ω0)2}={s2−(2Ω0)2}−s2(s){2s2+2(2Ω0)2}=4Ω202s(s2+4Ω20)=2Ω20s(s2+4Ω20)
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