台電物理一題 - 考試
By Joe
at 2013-05-04T14:30
at 2013-05-04T14:30
Table of Contents
測量無線電臺天線之高度,首先在某處測得天線頂點之仰角為30º後,又向天線前進80公尺處,測得天線頂點之仰角為45º,則天線高度為多少公尺?
我設高度為h,30º時為80+h去算 都算不出參考書的答案40(√3+1) 故來求助...
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我設高度為h,30º時為80+h去算 都算不出參考書的答案40(√3+1) 故來求助...
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