NAN DA XUE JING PIN KE CHENG sin (x +2 cos(x+2 sin(x+3. 故y=(sinx)=sin(x+n7) 类似,(c0sx)=c0(x+n) 高等歐學       = +  ) 2 sin( 2 (3)  y x ) 2 cos( 2  = x +  ). 2 sin( 3  = x +  ( ) ( ) (sin ) n n 故 y = x ). 2 sin(  = x + n ). 2 , (cos ) cos( ( )  x = x + n 类似 n