֪ʱȻ·ȥԼԼ
ҶԼ·һ㶼DZȽϼԼʽֻԼͼޡί
֮ûرõӣԼʡɱ
֪˵ٷˣȥƸһ㣬Ҳʡȥʱijɱ
л˵
Ƽصģ
Ӱˡ
ӵ˿cosҶ
ԷϷijؼԼż½رֱǴͣҶεİ˶Է
˿ʼԺҶʹԷ֣ȴشһ½
Ҷ룬ӦͬͬգٲþС˿ĸӰۻϷĸӰۻͱ
϶ܣ
ÿϷ˯ະĽУʲô߳ܵϷϷŷҡ
һ죬̲סˣҪ¼档
Ҳ⣬Ҳʮ֪Ӱͬͬյѱʲô®ɽĿҶͳúÿΪcosԺҲΪһƯDZȥݸָ
ȻʱλȫװĴᣬԷժñī¶ľȻ½
Ҷ±ˣ½
½ίʲôʱƭ㣬ûѰ
Ҷˣָ˵Ŀˣֻǰ㵱żҴûҪء
ŶԷģ½֪룬ڻ壺Բͺˡ̸ǰŪòã
26
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顣
˺ܿ¥, һ̨Ϸۡ
ˣֻ˵İϴ֡
û뵽ɵľIJ̶֪ȡ
ҾӦûнûѡſɡЦ
ҪϷ, ҵȻΪΪˡ
ʵһе¸СϷô̬ô
ȵȣʦ˵뻹ԭһĻҲỹԭǿһ𣿡
ۣȻûҪԭǿϷ, οԼʶcosʦҲ࣬ԻصĻظӦֻǰƬΣֳֻ
ϷһɫȫֳҲʲô£ͨÿcos, ȱԱ¾ͻѡķʽԭ顣ظУҲùܸܵһӽǵĿ֣Ҳһ÷
ˢ˼̨ˢ³һۡ
Լʵʱ, һˣλȦʱcoserʦʮȻЩҲİᴫţ, ȻԼˡ
ʮvҿԳݺʦww
ҵ죡Щ, ȥ˵ҳȷһDzDZˡæҵĽµ㿪˺þòŸϽظۺ, Һڴ
ҲԼ·˿жԷĹעһʱ֮ипǧںǰĽȻͬĴ, ĺ뺿һ, ã
Ȼϲcoserʦר, ǰûйĴ
ҿλ
ʮȦĴܹ㻹˵Сȷܺhh
һʣܴ߶ȣ
Ҳе㵣ģ1ʦŵͺá
ԼİնȣĿǰֻ뽫нԼ˫ŵĻ滹ԭɣطȻûҪٷְٻԭ˵ҲǸƣϷҲĿռ䣬ʣԲ
˻ԺΪԷʱҲˢʮܿʺá
[ʮvСʦ]
[ʮvʲôʱһأ]
ܻ֣̿æĴǣýСʦշͺˡٷ˵ܽᣬǸʱӦûкܶ˳ϯȥcеʱͿԳ㡣
һ£ʮǴ˴ιٷcos
[ʮvֻȥϯhhcлǺܽģҿԵ]
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