sin²(π+α)-cos(π+α)*cos(-α+1)的值为?sin²(π+α)- cos(π+α)乘以cos(-α)+1的值为?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/25 10:17:25
![sin²(π+α)-cos(π+α)*cos(-α+1)的值为?sin²(π+α)- cos(π+α)乘以cos(-α)+1的值为?](/uploads/image/z/1786665-57-5.jpg?t=sin%26%23178%3B%EF%BC%88%CF%80%2B%CE%B1%EF%BC%89-cos%EF%BC%88%CF%80%2B%CE%B1%EF%BC%89%2Acos%EF%BC%88-%CE%B1%2B1%EF%BC%89%E7%9A%84%E5%80%BC%E4%B8%BA%3Fsin%26%23178%3B%EF%BC%88%CF%80%2B%CE%B1%EF%BC%89-+cos%EF%BC%88%CF%80%2B%CE%B1%EF%BC%89%E4%B9%98%E4%BB%A5cos%EF%BC%88-%CE%B1%EF%BC%89%2B1%E7%9A%84%E5%80%BC%E4%B8%BA%EF%BC%9F)
sin²(π+α)-cos(π+α)*cos(-α+1)的值为?sin²(π+α)- cos(π+α)乘以cos(-α)+1的值为?
sin²(π+α)-cos(π+α)*cos(-α+1)的值为?
sin²(π+α)- cos(π+α)乘以cos(-α)+1的值为?
sin²(π+α)-cos(π+α)*cos(-α+1)的值为?sin²(π+α)- cos(π+α)乘以cos(-α)+1的值为?
sin²(π+α)-cos(π+α)*cos(-α+π)
=sin²α-cos²α
=-cos2α