化简:4sin π/4 cos π/4 求详解

问题描述:

化简:4sin π/4 cos π/4 求详解

4sin π/4 cos π/4
=2乘2sin π/4 cos π/4
=2sin π/2
=2sin90度
=2乘1
=2
不懂的欢迎追问,