化简sin²a+sin²β-sin²asin²β+cos²acos²β
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/03 22:38:19
![化简sin²a+sin²β-sin²asin²β+cos²acos²β](/uploads/image/z/1241548-52-8.jpg?t=%E5%8C%96%E7%AE%80sin%26%23178%3Ba%2Bsin%26%23178%3B%CE%B2-sin%26%23178%3Basin%26%23178%3B%CE%B2%2Bcos%26%23178%3Bacos%26%23178%3B%CE%B2)
化简sin²a+sin²β-sin²asin²β+cos²acos²β
化简sin²a+sin²β-sin²asin²β+cos²acos²β
化简sin²a+sin²β-sin²asin²β+cos²acos²β
sin²a+(sin²β-sin²asin²β)+cos²acos²β=sin²a+(cos²asin²β+cos²acos²β)=sin²a+cos²a=1,解答完毕~