已知α是锐角,化简,√Cos^2α-4Cosα+4-(1-Cosα)的绝对值
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![已知α是锐角,化简,√Cos^2α-4Cosα+4-(1-Cosα)的绝对值](/uploads/image/z/3937532-68-2.jpg?t=%E5%B7%B2%E7%9F%A5%CE%B1%E6%98%AF%E9%94%90%E8%A7%92%2C%E5%8C%96%E7%AE%80%2C%E2%88%9ACos%5E2%CE%B1-4Cos%CE%B1%2B4-%EF%BC%881-Cos%CE%B1%EF%BC%89%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC)
已知α是锐角,化简,√Cos^2α-4Cosα+4-(1-Cosα)的绝对值
已知α是锐角,化简,√Cos^2α-4Cosα+4-(1-Cosα)的绝对值
已知α是锐角,化简,√Cos^2α-4Cosα+4-(1-Cosα)的绝对值
α是锐角,
√Cos^2α-4Cosα+4-|(1-Cosα)|
=cosa-4cosa+4-1+cosa
=-4cosa+3