已知sinα是方程5x²-7x-6=0的根,求[sin(-α+3π/2)sin(π-α)tan²(2
2个回答
(x-2)(5x+3)=0
0
相关问题
已知tanα=2,sinα+cosα<0,求[sin(2π-α)*sin(π+α)*cos(-π+α)]/[sin(3π
已知:f(α)=sin(π2−α)•cos(3π2−α)•tan(5π+α)tan(−α−π)•sin(α−3π)
已知方程sin(α-3π)=2cos(α-4π),求sin(π−α)+5cos(2π−α)2sin(3π2−α)−sin
已知方程sin(α-3π)=2cos(α-4π),求sin(π−α)+5cos(2π−α)2sin(3π2−α)−sin
tan(3π-α)/sin(π-α)sin(3/2π-α)+sin(2π-α)cos(α-7/2π)/sin(3/2π+
已知f(α)=sin2(π−α)•cos(2π−α)•tan(−π+α)sin(−π+α)•tan(−α+3π).
已知f(α)=sin2(π−α)•cos(2π−α)•tan(−π+α)sin(π+α)•tan(−α+3π),
若sinα是方程6x=1-√x的根,试求tan(π-α)tan(2π-α)cos(5π-α)/cos(3π/2+α)的值
已知sin(α+π)=4/5,且sinα*cosα<0,求【2sin(α-π)+3tan(3π -α)】除以【4cos(
已知sinα是方程5x^2-7x-6=0的根求sin方{(2k+1\2)π-α