6+6sin(4x)=3 [-5,-2]
已知Sin(2x+pi/3)=1/3,求Sin(5Pi/6-4x),
三角等式求证:cos^6x+sin^6x=1-3sin^2x+3sin^4x
已知sin(x+π/6)=1/3,求sin(5π/6-x)+sin^2(π/3-x)
s = 2*sin(x)-sin(2*x)+2/3*sin(3*x)-1/2*sin(4*x)+2/5*sin(5*x)
6+6sin(4x)=3 [-5,-2]
已知函数f(x)=cos(2x-π/3)+2sin(x-π/4)sin(x+π/4)=sin(2x-π/6) ,
sin(5x)-sin(3x)= 根号2cos(4x)
已知sinα(x+π/6)=1/4,则sin(5π/6-x)+sin(π/3-x)的平方=?
已知sin(x+π/6)=1/4,则sin(7π+x)+sin^2(5π/6-x)的值
已知.sin (x+兀/6)=1/4.求:sin(5/6兀)+sin的平方(兀/3-x)
1.已知sin(π/6-x)=1/4,sin(π/6+2x)=?
已知sinα是方程5x²-7x-6=0的根,求[sin(-α+3π/2)sin(π-α)tan²(2