化简2tan(-α).cos(7π-α)/sin(5π-α)

2sinα*cosα*cos(2π-α)+cos(π+2α)*cosα*tanα化简! sin3(-α)cos(2π+α)tan(-α-π)化简 化简[sin²(α+π)cos(α+π)]/tan(α+π)cos³(-α-π)tan(-α-2π)化简sin²(α+π)cos(α+π)/tan(α+π)cos³(-α-π)tan(-α-2π) 化简cos(α+π)tan(2π+α) cosαtan（2π+α）化简 化简cos(α-π)sin²(α+2π)/tan (α+4π)tan(α+π)cos³(-α-π) 化简:(sin(α-3π)*cos(-α))/(tan(α-5π)*cos^2(α-5π)*tan(4π-α)) 化简cos(α -π )tan(α-2π)tan(2π-α)/sin(π+α) cos(π-α)tan(2π-α)tan(π-α)/sin(π+α) 化简 化简sin(9π+α）tan（3/2π+α）/cos(-4π-α）tan（15π+α）tan(7/2π-α） 已知cos(2α+β)=3cosβ,化简tanα×tan(α+β) 化简：[sin(π+α)*cos(π-α)*tan(π-α)]/[cos(π/2+α)*tan(3π/2-α)*tan(α-3π)] 化简sin(π/2+α)cos(3π-α)tan(π+α)/cos(π/2-α)cos(-α-π) 化简：(sin²αtanα+cos²α/tanα+2sinαcosα)sinαcosα 化简{sin(π+α)^3cos(-α)cos(π+α)}/{tan(π+α)^3cos(-π-α)^2} 化简(sinα)^2tanα+cosα+(cosα)^2*1/tanα+2sinαcosα 化简2tan(-α).cos(7π-α)/sin(5π-α) cosα*tanα