COS π/2究竟是多少？π不是180°嗎？可是COS90°=1不是嗎？我還用計算機按出了COS90°= -0.5？！而解答說= -1？？？
✨ 最佳解答 ✨
有什麼問題在跟我說😅
哦.....原來如此，謝謝！
不客氣😊
cosX度題目是說在cos90度到cos270度之間
cosX題目是只cos3.14/2度到cos3*3.14/2度之間
看了這個問題的人 也有瀏覽這些問題喔😉
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哦.....原來如此，謝謝！