sin(2x+π) 等于-sin(2x)
——————sin(2x+π) 等于sin(2x)吗?
4个回答
相关问题
-
sin2x*cosπ/3+sin2x*cosπ/3 为什么等于sin2x
-
y=sin(π/4+x/2)sin(π/4-x/2) =sin(π/4+x/2)sin[π/2-(π/4+x/2)]
-
f(x)=2sin2x-2sin(2x+3分之π）等于多少?
-
化简 sin²x+sin²(x+2π/3)+sin²(x-2π/3)
-
若sin(x-π)=2cos(2π-x),求(sin(π-x)+5cos(2π-x))/(3cos(π-x)-sin(-
-
为什么SIN（2X+ π/2）等于COS2X
-
sin^2(π/3-x)+sin^2(π/6+x)
-
y=sin2x-cos2x+1为什么等于√2sin（2x-π/4）+1
-
-cos(π/2-2x)应该等于sin2x还是-sin2x?怎么考虑?
-
f(x)=1-2sin^2(x+π/8)+2sin(x+π/8)*cos(x+π/8)=cos(2x+π/4)+sin(