1:已知cos(π/2-x)=根号2*sin(π-y),根号3*cos(-x)=-根号2*cos(π+y)且0<x<π,
1:已知cos(π/2-x)=根号2*sin(π-y),根号3*cos(-x)=-根号2*cos(π+y)且0<x<π,
函数y=根号3/2sin(x+π/2)+cos(π/6-x)的最大值
已知SIN(3π-α)=根号2COS(3/2π+b),根号3COS(-α=-根号2COS(x+b),且α,b属于(0,π
已知cos^2x-cos^2y=根号3/2,则sin(x+y)·sin(x-y)的值
y=sin(-2x+π/6)+根号3cos(2x-π/2)的递增区间
已知函数f(x)=[sin(x+a/2)+根号3cos(x+a/2)]*cos(x+a/2),若a属于(0,π),且f(
已知sin(3π-α)=根号二cos(3π/2+β),根号三cos(-α)=负根号二cos(π+β),且0
已知sin(x+π/3)cos(x-π/3)+cos(x-π/3)sin(x-π/3)=-(2根号2/3)且π
已知函数y=4 cos²x+4倍根号3 sin x cos x-2,x∈R.
已知函数f(x)=根号3cos(-π-x/2)sin(3π+x/2)-cos² x/2+1
已知函数y=sin(x/2)+根号3*cos(x/2),x属于R
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1