化简cos(3/2π+π)sin(-π+α)
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化简cos(3/2π+π)sin(-π+α)
化简cos(3/2π+π)
sin(-π+α)
化简cos(3/2π+π)sin(-π+α)
cos(3/2π+π)=cos(π/2+2π)=cosπ/2=0
=cos(π/2)=0
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)
化简sin(-π/2-α)sin(πα)cos(-α-π)/cos(π-α)sin(3π α)
化简 sin(2π-a)sin(π+a)cos-π-a) / sin(3π-a)cos(π-a)
(1+sinα+cosα)*[sin(α/2)-cos(α/2)]/√(2+2cosα)化简 (3/2*π
化简:sin(-a)cos(2π+a)sin(-a-π)
化简:[sin( π -a) cos( π+a)cos(3/2 π+a )]/cos(3 π-a )sin(3 π+a )sin(5/2 π-a )
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cos(3/2π+π)sin(-π+α)
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化简√1-2sin(π-3)cos(π+3)
根号[1-2sin(3-π)cos(3-π)]化简
化简:sin(3π/2-a)cos(2π+a)
化简sin(2π+a)cos(π-a)cos(π/2-a)cos(7π/2-a)/cos(π-a)sin(3π-a)sin(-π+a)sin(5π/2+π)
化简:sin(2π-a)cos(π+a)cos(π/2+a)cos(11π/2-a)/cos(π-a)sin(3π-a)sin(-π-a)sin(9π/2+a)
化简:tan(π-a)cos(2π-a)sin(-a+3π/2)/cos(-a-π)sin(-π-a)
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)=