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[請問] 數學:已知3夾角求向量 (感恩)
Oct 19th 2013, 04:54, by hajimez

作者hajimez ()

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標題[請問] 數學:已知3夾角求向量 (感恩<(_ _)>)

時間Sat Oct 19 04:54:02 2013

這題看似簡單但想破頭還是想不出來... 到現在已經n個小時了QQ 網路上也找了很久,但都沒有看到相關答案 問題如附圖(希望我沒有畫得看不懂): 三個空間中的向量(非平面),其中兩個已知一個未知,但三者互相之間的夾角已知, 求未知的那個向量。 https://www.dropbox.com/s/eixk2drf52m5qx9/3vectors-06.jpg
需要用到旋轉矩陣之類的嗎? 複雜也沒關係,我只需要結果是對的就好(例如以x=? y=? z=? ) 救命之恩無以回報,只能用約一半財產p幣5000聊表心意。 -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 36.224.169.29 ※ 編輯: hajimez 來自: 36.224.169.29 (10/19 04:55) hajimez:轉錄至看板 Math 10/19 04:58

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2013 - Yahoo奇摩 搜尋結果
2013 - Yahoo奇摩 搜尋結果 
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金鐘頒獎在即 仔仔祝福龍劭華
Oct 18th 2013, 18:53

【大紀元2013年10月19日訊】(大紀元記者林蘇菲台灣報導)仔仔周渝民和侯佩岑昨(18)日出席一場服裝品牌的代言活動。對於二度入圍金鐘,仔仔謙虛的表示:「已經感受到評審對我的表演的肯定,很高興!」也祝福前輩龍劭華能得獎。

出席代言活動,仔仔身穿紅藍格紋交織的學院風外套,休閒俐落;而侯佩岑則以一襲長外套搭配駝色緊身褲,展現今年秋冬的都會時尚感。

金鐘獎典禮在即,4年前仔仔曾以《痞子英雄》與同劇的趙又廷一起入圍,最後寶座由趙又廷奪下。今年再度以《回家》第二度入圍金鐘影帝,他表示,希望金鐘獎多給資深藝人肯定,不論誰得獎,都給予祝福。

至於侯佩岑則是以《樂光寶盒》入圍綜藝節目主持人,從甜心主播轉型成主持人的她,笑稱自已是抱著只參加盛會,沒有想要得獎的心情,「可以做自己喜歡的事就已經是得大獎了,對我是很大的鼓勵!」

(責任編輯:劉宇涵)

請關注大紀元的廣告商家,向朋友推薦大紀元,感謝您的支持!

本文網址: http://epochtimes.com/b5/13/10/18/n3989969.htm金鐘頒獎在即-仔仔祝福龍劭華.html  美東時間: 2013-10-18 13:28:50 PM 【萬年曆】

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Yahoo!奇摩知識+ - 分類問答 - 視聽娛樂 - 發問中
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初階二手音響入門借問!
Oct 18th 2013, 04:35

知識問題|

發問者: 匿名
發問時間: 2013-10-18 12:35:58 ( 還有 9 天發問到期 )
解答贈點: 10 ( 共有 0 人贊助 )
回答: 0 0

新手問問:
1.目前有鐵板燒一台,換小螃蟹音質會不會更好?
2.喇叭DIY只有DS這家的嗎,ProAc R3.8 clone好像很hi-end,不過很難買到?
3.Y拍的謎之音DAC TDA 1541 箐X 音響 說能PK 3X萬等級聲音,真假?
4.設備MF A1 pure A class+ProAc R3.8 clone+謎之音DAC TDA 1541 箐X 音響 = 是否等於十萬元級Hi-end?

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