[微積] 大學微積分 釣魚的題目

看板Math作者 (狐王無歡)時間7年前 (2018/12/06 10:43), 編輯推噓0(000)
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請教各位前輩高手以下這題: A fish is reeled in along the water surface at a rate of 0.4m/s from a point 4m above the surface. At what rate is the angle θ between the line and the water changing when there is a total of 10m line from the end of the rod to the water? / /∣\ / ∣ \ -----/ ∣ \ x (這裡標了一個 x ,但我想不出這要幹嘛?) ∣ \ 4m∣ \ ∣ θ \ ----------------------------- 答案是 (2根號21)/525 謝謝各位 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 119.77.150.223 ※ 文章網址: https://www.ptt.cc/bbs/Math/M.1544064227.A.397.html
文章代碼(AID): #1S28pZEN (Math)
文章代碼(AID): #1S28pZEN (Math)