測量無線電台天線之高度，首先在某處測得天線頂點之仰角為30°後，又向天線前進80公尺處，測得天線頂點之仰角為45°，則天線高度為多少公尺？(A) 40 (√3+1) (B) 40 ( √3-1)

問題詳情

1.測量無線電台天線之高度，首先在某處測得天線頂點之仰角為30°後，又向天線前進80公尺處，測得天線頂點之仰角為45°，則天線高度為多少公尺？
(A) 40 (√3+1)
(B) 40 ( √3-1)
(C) 30 ( √3+1)
(D) 30 ( √3-1)

參考答案

答案：A
難度：適中0.613139
統計：A(84),B(21),C(7),D(2),E(0)

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