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Clearnote
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Senior High
Mathematics
請問第二小題
Mathematics
Senior High
7 monthsago
fighting!
請問第二小題
(1)假設為實數,試利用柯西不等式解釋一 7 ≤ 3 sin8+2 cosA≤/7. (2)如圖,一個兼具設計與遮蔭功能的裝置 A 藝術架設在地面,其中點為地面基座, 並由柱子AA',BB'支撐,已知 3 ∠AOB=60°, AO=3,BO=2,試求此 裝置藝術該如何架設,才能使其在地面 的影長A'B'最長?又最長影長為何? 2 B A' 3005α B' 2 co> (180 - (1+63) 配合課本P.177 =2 co
平面向量
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