化简根号下(1-sin²220°)若α为第二象限角化简根号下(1-sin²220°)的结果是()A。sin220°B。-sin220°C。cos220°D。-cos220°
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![化简根号下(1-sin²220°)若α为第二象限角化简根号下(1-sin²220°)的结果是()A。sin220°B。-sin220°C。cos220°D。-cos220°](/uploads/image/z/1259932-4-2.jpg?t=%E5%8C%96%E7%AE%80%E6%A0%B9%E5%8F%B7%E4%B8%8B%281-sin%26%23178%3B220%C2%B0%EF%BC%89%E8%8B%A5%CE%B1%E4%B8%BA%E7%AC%AC%E4%BA%8C%E8%B1%A1%E9%99%90%E8%A7%92%E5%8C%96%E7%AE%80%E6%A0%B9%E5%8F%B7%E4%B8%8B%281-sin%26%23178%3B220%C2%B0%EF%BC%89%E7%9A%84%E7%BB%93%E6%9E%9C%E6%98%AF%EF%BC%88%EF%BC%89A%E3%80%82sin220%C2%B0B%E3%80%82-sin220%C2%B0C%E3%80%82cos220%C2%B0D%E3%80%82-cos220%C2%B0)
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化简根号下(1-sin²220°)若α为第二象限角化简根号下(1-sin²220°)的结果是()A。sin220°B。-sin220°C。cos220°D。-cos220°
化简根号下(1-sin²220°)
若α为第二象限角化简根号下(1-sin²220°)的结果是()A。sin220°B。-sin220°C。cos220°D。-cos220°
化简根号下(1-sin²220°)若α为第二象限角化简根号下(1-sin²220°)的结果是()A。sin220°B。-sin220°C。cos220°D。-cos220°
选D
cos2200