已知sin(x+π/6)=-3/5,求sin²(π/3-x)-sin(5π/6-x)的值
已知sin(x+π/6)=-3/5,求sin²(π/3-x)-sin(5π/6-x)的值
已知sinα是方程5x²-7x-6=0的根,求[sin(-α+3π/2)sin(π-α)tan²(2
已知sin(x+π/6)=1/3,求sin(7π/6+x)+cos²(5π/6-x)的值
已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x)
已知函数f(x)=-根号3sin²x+sinxcosx,求f(25π/6)
已知.sin (x+兀/6)=1/4.求:sin(5/6兀)+sin的平方(兀/3-x)
已知sin(x+π/6)=0.25,则sin(5π/6-x)+sin(π/3-x)*sin(π/3-x)的值为多少
已知sinα(x+π/6)=1/4,则sin(5π/6-x)+sin(π/3-x)的平方=?
已知cosx=3/5,x属于(0,π),求sin(x-π/6),tan(x-π/6)的值
已知函数f(x)=sin(2x+π/6)+sin(2x-π/6)+2cos²x
已知函数f(x)=sin(2x+π/6)+sin(2x-π/6)+2cos²x
5已知函数 f(x)=sin(wx+π/6)+sin(wx-π/6)-2cos²(wπ)/2x∈R求函数 f(