【急】角所在象限的判断已知a为第二象限角,则a/2为第几象限角?我知道可以从代数和几何两个角度解这道题:(1)90°+k*360°
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![【急】角所在象限的判断已知a为第二象限角,则a/2为第几象限角?我知道可以从代数和几何两个角度解这道题:(1)90°+k*360°](/uploads/image/z/8551025-17-5.jpg?t=%E3%80%90%E6%80%A5%E3%80%91%E8%A7%92%E6%89%80%E5%9C%A8%E8%B1%A1%E9%99%90%E7%9A%84%E5%88%A4%E6%96%AD%E5%B7%B2%E7%9F%A5a%E4%B8%BA%E7%AC%AC%E4%BA%8C%E8%B1%A1%E9%99%90%E8%A7%92%2C%E5%88%99a%2F2%E4%B8%BA%E7%AC%AC%E5%87%A0%E8%B1%A1%E9%99%90%E8%A7%92%3F%E6%88%91%E7%9F%A5%E9%81%93%E5%8F%AF%E4%BB%A5%E4%BB%8E%E4%BB%A3%E6%95%B0%E5%92%8C%E5%87%A0%E4%BD%95%E4%B8%A4%E4%B8%AA%E8%A7%92%E5%BA%A6%E8%A7%A3%E8%BF%99%E9%81%93%E9%A2%98%EF%BC%9A%EF%BC%881%EF%BC%8990%C2%B0%2Bk%2A360%C2%B0)
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