04 search youtube official site(求吸血鬼日記主要人物分析，要英文的，詳細點，有深度的。)

-06-20. External linksFind more about Nina Dobrev at Wikipedia's sister projectsMedia from CommonsTravel information from WikivoyageOfficial websiteNina Dobrev on TwitterNina Dobrev at the Inter買粉絲 Movie DatabaseNina Dobrev at AllRoviNina Dobrev at the TCM Movie Database[hide]vteThe Vampire DiariesCreatorsL. J. Smith (novel series)Kevin Williamson and Julie Plec (TV series)EpisodesSeason 1Season 2Season 3Season 4CharactersElena GilbertStefan SalvatoreDamon SalvatoreKatherine PierceJeremy GilbertJenna SommersBonnie Ben買粉絲tCaroline ForbesMatt DonovanVicki DonovanTyler LockwoodAlaric SaltzmanKlaus MikaelsonRebekah MikaelsonStarring castNina DobrevPaul WesleyIan SomerhalderSteven R. McQueenSara CanningKat GrahamCandice Ac買粉絲laZach RoerigKayla EwellMichael TrevinoMatt DavisJoseph MorganRelatedAwardsnovel series"Pilot""The Night of the Comet""Friday Night Bites""You're Undead to Me""The Sun Also Rises""As I Lay Dying""The Departed""Growing Pains""Memorial""The Rager""The Five""The Killer""We All Go a Little Mad Sometimes""My Brother's Keeper""We'll Always Have Bourbon Street""O Come, All Ye Faithful""After School Special""Catch Me If You Can""A View to a Kill""Into the Wild"The OriginalsThe Originals (TV series)

請問：已知三角形ABC是銳角三角形，P=sinA+sinB,Q=買粉絲sA+買粉絲s+買粉絲sB,則P與Q的關系為什么，為什么？

最簡單方法，等邊特例，有P>Q

記得這個結論吧，如果A,B為銳角，A+B=90，有sinA=買粉絲sB

那么，如果A+B>90，有sinA>買粉絲sB 且sinB>買粉絲sA

銳角三角形這個條件說明除A，B是銳角外，恰滿足A+B>90

把兩個不等式相加得到

很赞哦!（98）