cos^2(π/2-x)≠1怎么解啊

来源：学生作业帮助网 编辑：作业帮 时间：2024/04/30 09:53:32
cos^2(π/2-x)≠1怎么解啊

cos^2(π/2-x)≠1怎么解啊
cos^2(π/2-x)≠1怎么解啊

cos^2(π/2-x)≠1怎么解啊
cos²(π/2 -x)≠1
sin²x≠1
sinx≠1且sinx≠-1
x≠2kπ±π/2 (k∈Z).