化简:[sin(π+3α)cos(-α+3π)sin(α-3π/2)cos(11π/2-α）]÷[cos（3α+9π/2)sin(-α-π）化简:[sin(π+3α)cos(-α+3π)sin(α-3π/2)cos(11π/2-α）] ÷ [cos（3α+9π/2)sin(-α-π）tan（-π+α）tan(π/2-α）]

化简:sin(2π-α)cos(π+α)cos(11π/2-α)/cos(π-α)sin(3π-α)sin(-π-α)sin(9π/2+α) (1+sinα+cosα)*[sin(α/2)-cos(α/2)]/√(2+2cosα)化简 （3/2*π 化简sin(-π/2-α)sin(πα)cos(-α-π)/cos(π-α)sin(3π α) 化简sin(α-5π)/cos(3π-α)×cos(π/2-α)/sin(α-3π)×cos(8π-α)/sin(-α-4π) 化简sin(α-2π)+sin(-a-3π)cos(α-3π)/cos(π-α)-cos(-π-α)cos(α-4π) 化简√3sinα-cosα 化简：cos(π/3+α)+sin(π/6+α) 化简cos(3/2π+π)sin(-π+α) sinα+cosα 化简 化简:sin(π/4-α)cos(π/3-α)-cos(π/6+α)sin(π/4+α)= 化简sin(α-3/2π)cos(α-π)-sin(α-2π)cos(α-π/2)=? 化简:sin(2π-α)cos(π/2+α)+sin(3π/2-α)cos(π-α)= 化简2sin[(π/2)+α]-cos(-π+α)/cos(3π+aα) 化简：sinα-√3 cosα+2cos(α-π/3) 化简:cos(2π-α)sin(-π-α)/sin(π/2+α)tan(3π-α) 化简sin(π/2+α)cos(3π-α)tan(π+α)/cos(π/2-α)cos(-α-π) 化简{sin(π+α)^3cos(-α)cos(π+α)}/{tan(π+α)^3cos(-π-α)^2} 3sinα=2cosα,则 cosα-sinα/cosα+sinα/ cos3sinα=2cosα,则cosα-sinα/cosα+sinα/cosα+sinα/cosα-sinα