sin(x-π/3)=1/3,则cos(x+π/6)=?
问题描述:
sin(x-π/3)=1/3,则cos(x+π/6)=?
答
cos(x+六分之派)=cos[二分之派+(x-三分之派)]=-sin(x-三分之派)= -三分之一请采纳^_^
sin(x-π/3)=1/3,则cos(x+π/6)=?
cos(x+六分之派)=cos[二分之派+(x-三分之派)]=-sin(x-三分之派)= -三分之一请采纳^_^