cos(x+π/3)是不是等于sin(x-π/6)
sin(π/4-x)为什么等于cos(x+π/4)
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
sin(2x+ π/3)乘cos(2x+π/3)等于
已知sin(x-3π/4)cos(x-π/4)=-1/4,则cosx等于
为什么cos(x-3π/4)等于sin[(5π/4)-x]?
1)诺sin(π/6-x)=1/3,则cos(2π/3+2x)等于
已知f(x)=-1/2+sin(π/6-2x)+cos(2x-π/3)+cos平方x.
已知函数f(x)=cos(2x-π/3)+sin^2 x-cos^2 x
已知函数f(x)=cos(2x-π\3)+sin²x-cos²x
函数f(x)=cos2x+cos(x+π/3)+sin(x+π/6)+3sin^2x的最小值
求证 tan(2π-X)sin(-2π-X)cos(6π-X)/ sin(X+3π/2)*cos(X+3π/2)=-ta
设函数f(x)=2+sin(3x+π/12)cos(x+π/6)+cos(3x+π/12)sin(x+π/6)