x(t) = cos ( kw0 t ) t cos(s) = 1. 2. ( js. + . −js. ) = 1. 2. ( j kw0 t. + . −j ... x(t) = sin( kw0 t ) sin(s) = 1. 2j. ( js. − . −js. ) = 1. 2j.
確定! 回上一頁