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Clearnote
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Senior High
Mathematics
兩題都不會
Mathematics
Senior High
Resolved
about 2 monthsago
Z
兩題都不會
3. 操場中間有一棵50公尺高的大樹,令其底部為P點,頂端為2點。小林現在位於大樹的西 30°南方向上的一點4,已知小林從4看向Q的仰角為45°,之後小林以等速直線方式走到另 一點B,發現B 在大樹的東 60° 南方向上且看向Q的仰角為30°,試問: (1)若小林1分鐘可走20公尺,則他從A到B花了 5分鐘(20分) (2) cos∠AQB=【 】。(15分) 4
高一數學
Answers
✨ Best Answer ✨
婷
about 2 monthsago
看圖,不懂繼續問
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