動力學-角度計算 - 考試
By Jake
at 2015-06-05T01:17
at 2015-06-05T01:17
Table of Contents
[課業] 國考課業相關問題,歷屆考題的討論,如學理觀念的釐清。
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題目如上所示,雖然題目是動力學但主要問題是當中的角度計算
最一開始時求δ=90+β-γ=78.3
其中β=sin-1(0.15/0.4)=22
γ=cos-1(0.1/0.15)=33.7
疑問在於δ是如何計算
三角形內角合=180
其中一角度β已知
另外一角度可以用90-γ=56.3
求δ=180-22-56.3=101.7
那請問是如何計算到78.3的
就算用78.3回推三內角合也不等於180
請問是如何計算的
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