V L + V C = 0 {\displaystyle V_{L}+V_{C}=0} d 2 d t 2 i + 1 T i = 0 {\displaystyle {\frac {d^{2}}{dt^{2}}}i+{\frac {1}{T}}i=0} d 2 d t 2 i = − 1 T i {\displaystyle {\frac {d^{2}}{dt^{2}}}i=-{\frac {1}{T}}i} i = A S i n ω t {\displaystyle i=ASin\omega t} ω = 1 T {\displaystyle \omega ={\sqrt {\frac {1}{T}}}} T = L C {\displaystyle T=LC}