已知f(阿尔法)=sin(π/2+α)+3sin(

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已知f(α)＝sin(π2+α)+3sin(−π−α)2cos(11π2−α)−cos(5π−α)．
已知f（α）=sin(α−3π)•cos(π+α)cos(2π−α)•sin(−π−α)•sin(3π2−α)
已知f(α)＝sin(α−3π)•cos(2π−α)•sin(−α+3π2)cos(−π−α)•sin(−π−α)
已知f（α）=sin(π−α)cos(2π−α)cos(−α+32π)cos(π2−α)sin(−π−α)
已知sin（α-π）=2cos（2π-α），求sin(π−α)+5cos(2π−α)3cos(π−α)−sin(−α)的
已知1/2sin(α-π)=cos(α-2π),求sin（π-α）+5cos（2π-α)/3sin（3π/2+α-sin
已知sin(7π-α)-3cos(3π/2+α)=2,则(sin(π-α)+cos(π+α))/(sinα+cos(-α
已知：f(α)＝sin(π2−α)•cos(3π2−α)•tan(5π+α)tan(−α−π)•sin(α−3π)
sin(π/2+α)·cos(π/2-α)/cos(π+α)+sin（π-α）·cos（π/2+α）/sin（π+α）=
已知方程sin（α-3π）=2cos（α-4π），求sin(π−α)+5cos(2π−α)2sin(3π2−α)−sin