高一三角函数化简题sin^2(α+π)*cos(π+α)*cot(-α-2π)/tan(π+α)*cos(-α-π)打错了正确的是sin^2(α+π)*cos(π+α)*cot(-α-2π)/tan(π+α)*cos^2(-α-π)

　　高一三角函数化简题

　　sin^2(α+π)*cos(π+α)*cot(-α-2π)/tan(π+α)*cos(-α-π)

　　打错了正确的是sin^2(α+π)*cos(π+α)*cot(-α-2π)/tan(π+α)*cos^2(-α-π)