不客氣。公式在百度三角函數詞條裏有。此類求角度的幾何問題如用三角函數來解三角方程都可以試用此公式。

來源: 羅擊於 2024-06-02 11:46:05 [舊帖] [給我悄悄話] 本文已被閱讀：次

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