y=sinx+cosx怎样化简
问题描述:
y=sinx+cosx怎样化简
答
√2/2y=√2/2sinx+√2/2cosx
√2/2y=cos(π/4)sinx+sin(π/4)cosx
√2/2y=sin(x+π/4)
y= √2sin(x+π/4)