化简 f(α)=sin(π—α) cos(2π—α)tan(-α+3/2π)/cot(-α-π)sin(-π-α)

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化简f(α)=sin(π—α)cos(2π—α)tan(-α+3/2π)/cot(-α-π)sin(-π-α)化简f(α)=sin(π—α)cos(2π—α)tan(-α+3/2π)/cot(-α-π

化简 f(α)=sin(π—α) cos(2π—α)tan(-α+3/2π)/cot(-α-π)sin(-π-α)
化简
f(α)=sin(π—α) cos(2π—α)tan(-α+3/2π)/cot(-α-π)sin(-π-α)

化简 f(α)=sin(π—α) cos(2π—α)tan(-α+3/2π)/cot(-α-π)sin(-π-α)
-cosα对不对
sin(π—α) =sinα,cos(2π—α)=cosα,tan(-α+3/2π)=ctgα,上面就是(cosα)^2;
cot(-α-π)=-ctgα,sin(-π-α)=sinα,然后化间

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