s(t)=sin(314t)/314t怎么求傅立叶变换
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s(t)=sin(314t)/314t怎么求傅立叶变换
求卷积s(t)=sin(t)u(t)*u(t-1)
已知正弦电压u=311sin 314t,当t--0.01 s时,电压的瞬时值为( ).
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x=tan(t) sin(t)-cos(t)=?
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u(t)=5sin(314t+110°)V与i(t)=5cos(314t-95°)A的相位差
u=100sin(314t+45°)/i=10sin(314t-30°)两者相位差
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v=s/t
S.T.