触手tv网页版个人中心:正弦函数化简
来源:百度文库 编辑:查人人中国名人网 时间:2024/05/26 19:16:04
1+sin(a-2π)sin(π+a)-2cos^2(a)
请化简!
请化简!
1+sin(a-2π)sin(π+a)-2cos^2(a)
= 1+sina(-sina)-2cos^2(a)
= cos^2(a)-2cos^2(a)
= - cos^2(a)
1+sin(a-2π)sin(π+a)-2cos^2(a)
= 1+sina(-sina)-2cos^2(a)
= cos^2(a)-2cos^2(a)
= - cos^2(a)