作业帮将函数y=sin(7π/8-x)cos(x+π/8)的化简
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 01:36:54
将函数y=sin(7π/8-x)cos(x+π/8)的化简
将函数y=sin(7π/8-x)cos(x+π/8)的化简
将函数y=sin(7π/8-x)cos(x+π/8)的化简
原式=sin[π-(7π/8-x)]cos(x+π/8)
=sin(x+π/8)cos(x+π/8)
=1/2[2sin(x+π/8)cos(x+π/8)]
=1/2sin[2(x+π/8)]
=(1/2)sin(2x+π/4)