Ch4-1 - i i=I sin(t i Im T Im T t 1 T f 2 3 1 f T s f 1

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第第第 第第第第第第 第第第 第第第第第第第第第第 正正正 正正正正正正正
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第第第第第 : 第第第第第第第第第第第第第第第 第第第第第第第第第第第第第第第第第 第第第第第第第第第第第第第第第第第第第 第第第 第第第第第第 第第第第第第第第第第第第第第第第第第第第第第第第第 第第第 第第第第第第
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i = I sin t + ψ ) 第 第第第第第 t i m I ψ T 第第第第第第第第 , 第 Im 第 T 第第第 , 第第第第第第第第第第第 , 第第第第第第第第第第 第第第第第第第 第第第第 i 第第第第第第第第
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正正正正正正正 1. 第第 T 第第第 f 第第第第 ω 2. 第第第第第第第 3. 第第第第第第第第第
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第第 T : 第第第第第第第第第第第第 第第第第第第第第第第 ( s 第第 第第 f : 1 第第第第第第第第第第第 第第第第第第第第第第 H Z ) 第 第第 f =1/T T =1/ f 1. 第第第第第第 f 第第第第 ω 第第第 ω : 第第第第第第第第第第第第第第第 第第第第第第第第第 / 第第 r ad/ s 第 . ω=2π/T=2π f
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第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第第 第第第
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