Natural Science
Mahasiswa

請問是怎麼列出1.150(cos30+sin30)+80(-sin20+cos20)這一條式子的?是因為圓的參數式嗎?
2.-sin20怎麼來的?

Sample Problem 2.3 Four forces act on bolt 4 as shown- Detensts resultant ofthe forces on the bolt. 全
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