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>> No.12313436 [View]
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12313436

>>12313397
[eqn]a_1 \sin(\omega t)+a_2\cos(\omega t)=Asin(\omega t+\phi)\
A=\sqrt{a_1^2+a_2^2}\
\tan\phi=\frac{a_2}{a_1}[/eqn]

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