来自孙义林的问题
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)
1回答
2020-01-30 00:23