化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
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化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
=-sinα*(-tanα)/(-tanα)sinα=-(sinα)^2
-cosx*-cotx/-tanx*sinx=-cosxcotx/tanxsinx=cotx*cotx*cotx
化简cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α)
化简[sin(π-α)tan(5π/2+α)]/[cos(2π-α)cot(π/2-α)]分后给
若COSα=4/5,α∈(0 π)则COtα的值
cosα=4/5,α∈(0,π),则cotα的值等于多少?
化简:(cos^2α-sin^2α)/【2*cot(π/4+α)*cos^2(π/4-α)】
求证(cotα-cosα)/cotα×cosα= (cotα×cosα)/ (cotα-cosα)
{[sin(π-α)-cosα]^2}/{cot[(3π/2)+α]} - 2cos(α+5π/6)*cos(α-5π/6)
化简[cos(α-π)*cot(5π-α)]/[sin(-2π-α)]②sine*根号下(1+cot²e)(e为第三象限角)
化简sinαcosα(tanα+cotα)
化简 sinαcosα(tanα+cotα)
化简:sinα ×cosα(tanα+cotα)
化简:[sin(2004π-α)cos(α-2005π)/cot(2003π-α)sin(α+3π)]+sin(α-π)
化简cosα+cotα/1+sinα
化简tan(α-π)cos(α-3π)/tan(3π+α)cot(-π-α)sin(-α)
化简:cotα根号(1-cos平方α)
cos(α-π)cot(5π-α)/tan(2π-α)sin(-2π-α) 急昂
已知α∈(0,π),sinα+cosα=1/5,求tanα-cotα的值,
cos(α-3π/2)=1/5,求sinα*cotα α是第三象限角.