三角函数y=2sin(-2x+0.5)的初相
问题描述：
三角函数y=2sin(-2x+0.5)的初相
y=2sin(-2x+0.5)应转化成y=2sin(2x+π-0.5)
问是怎么转化的?怎么推导?
答
y=2sin(-2x+0.5)=-2sin(2x-0.5)
=2sin(2x+π-0.5)