­ì²z25

 

 

&      

[ÃÒ©ú]   [·Å¬Gª¾·s]

<Pf.>



|cos
q|=1
cos
q=1               ©Î cosq=-1
cos
q=cos0¢X        ©Î cosq=cos180¢X
q=0¢X                   ©Î q=180¢X
¦P¦V            ©Î ¤Ï¦V