cos(3π/2 - π/3),求值

来源：学生作业帮助网编辑：作业帮时间：2024/05/04 01:19:58

cos(3π/2 - π/3),求值
cos(3π/2 - π/3),求值

cos(3π/2 - π/3),求值
解cos(3π/2 - π/3)
=cos(π+π/2 - π/3)
=-cos(π/2 - π/3)
=-sin（π/3)
=-√3/2.

-√3/2