第九章三角函數 9-2 正弦與餘弦函數的積分. 14. 第九章 三角函數. 求定積分. 求. 解: 首先求不定積分 。令t = 2 + sin x ，則dt = cos t dt ，故得.
三角函數(復習教材) 三角函數復習講義. 第六單元 三角函數. 例1.(1）（2）各為多少度？ Ans：. 例2.是多少 弧度？ Ans：. 例3.某時鐘時針長2公吋, ...
三角函數常用解題方法.doc 3.同角三角函數的關係. 3.單位圓. 3.三角函數符號規律：一全正，二正弦，三正切，四 余弦；. 4.特殊角的三角函數值. 3.偶同奇餘，象限定號。 4. 知1求2問題. 5.平方差公式.
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