87-1 Characteristics of sinusoids V sin ot y sin ot Vn-- amplitude(振幅 兀 a-- arg ument(幅角) T--period (T=1/f,OT=2丌,O=2m) f--frequency A more general form of the sinusoid @--angular frequency 丿 sin at u=Vm sin(at +9 (at +9)--arg ument V sin(at+gy 9--phase angle 「 v sin((or+9) leads(超前)V sin at by raa, orv sin at lags(滞后)nsin(or+9b9rad§7-1 Characteristics of sinusoids f frequency T period − − − − V amplitude(振幅) m − − t − −argument(幅角)  − −angular frequency t   2 V t m sin Vm 0 (T = 1/ f ,T = 2 , = 2f ) t   2  V t m sin V sin(t +) m 0 A more general form of the sinusoid phase angle ( t ) arg ument − − + − −     =Vm sin(t +) sin sin( ) . sin( ) sin , or V t lags V t by rad V t leads V t by rad m m m m         + + （滞后） （超前）  =Vm sint