電路學的一題 - 考試

By Rae
at 2019-07-24T21:38
at 2019-07-24T21:38
Table of Contents
https://imgur.com/3m3RLnz
答案是A,但sin轉成cos的角度我認為要減90度
相角 = 60-90 = -30度才對
還是說這是文字遊戲,正弦相量函數?
那有餘弦相量函數這種東西嗎?
--
答案是A,但sin轉成cos的角度我認為要減90度
相角 = 60-90 = -30度才對
還是說這是文字遊戲,正弦相量函數?
那有餘弦相量函數這種東西嗎?
--
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