化簡sin^2(α π)cos(π α)cot(-α 2π)/tan(π-α)cos^3(-α-π)
要過程!急要!網友廻答：
- sin^2(α π)cos(π α)cot(-α 2π)/tan(π-α)cos^3(-α-π)
=(-sinα)^2*(-cosα)*cot(-α)/(-tanα)cos^3(-α π)
=(sinα)^2*cosα*cotα/tanαcos^3(-α)
=sinα*cosα*cosα/tanα(cosα)^3
=sinα*(cosα)^2/sinα(cosα)^2
=1
admincos(π+α)cot(-α+2π)tan(π-α)cos^3(-α-π)要過程!急要!.jpg "化簡sin^2(α+π)cos(π+α)cot(-α+2π)tan(π-α)cos^3(-α-π)要過程!急要!,第1張")
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