????:1???????:????

2????????

3????????

4???????

5????????

?10??????!??:????????????????

??????????,????«??????????»????????,??2?18??????20???????????,«?????????????????????2»???1??????????????8??

2??????18????,??,?????????10??“?2”!??:“«?????????2»?????????22???,??????,????”

???????????,?????????????cos(??)???????????:??“?????????????????????”,?“?????????”,???

??????cos???????????,?????????:??cos???

??????,????????,??:“??,??,????????,?????????”

?,???“??”,??«???»???????;??“????????????”,????????????????«????????????????»????????????,??????

??,???????,“???????????“???”??????????????????????????!”“??????!”“???????,??”

«???????????????2»??????

22????????

????????:??????!??!

????2?18????,«??»?,??2???????????19??????????2???22?????,????????

????????(2??????????18?????),«???»???????????,???,????“????????”????,2???22?,??????????8?,«??????»?(???)?123.2?????

???????????????????????????????,???????????????,«??????????»??,?????????,???????:“??????????,??,??????,??”

?????????????,??«????????»???????????,????????«????»?????????,??????“????”???

“????'?????????«???????»'?,?????????”??????,?????????,??

?????????,??,?????????????????????:“??????,??????????????”??

????/???:????????????????????????????????????????

(??????)

???:???????????????