11题。thanks.teacher.

来源：学生作业帮编辑：大师作文网作业帮分类：数学作业时间：2024/11/12 19:49:42

解题思路： (1)对所给的条件平方后，结合同角三角函数的基本关系式来求；(2)在(1)的基础上，结合二倍角公式来求值.
解题过程：

11题。thanks.teacher. 英语作文 Thanks,dear teacher Thanks for　teacher外语作文两个英语单词拼写题1.Thanks to my English teacher,my spoken English ha "thanks for every teacher"这句话对么? Thanks for being an inspiring teacher. Thanks the most respectable teacher,Zhang Lili,the students 英语作文 Thanks,dear teacher及汉语意思英语2题 thanks, 英语翻译如题.thanks 标上题号,Thanks! 9,10题,thanks