如果∠A为锐角,且cosA=1/4,那么∠A的范围是.A.0° < ∠A < 30°B.30° < ∠A < 45°C.45° < ∠A < 60°D.60° < ∠A < 90°------------------------------------
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![如果∠A为锐角,且cosA=1/4,那么∠A的范围是.A.0° < ∠A < 30°B.30° < ∠A < 45°C.45° < ∠A < 60°D.60° < ∠A < 90°------------------------------------](/uploads/image/z/11427085-37-5.jpg?t=%E5%A6%82%E6%9E%9C%E2%88%A0A%E4%B8%BA%E9%94%90%E8%A7%92%2C%E4%B8%94cosA%3D1%2F4%2C%E9%82%A3%E4%B9%88%E2%88%A0A%E7%9A%84%E8%8C%83%E5%9B%B4%E6%98%AF.A.0%C2%B0+%EF%BC%9C+%E2%88%A0A+%EF%BC%9C+30%C2%B0B.30%C2%B0+%EF%BC%9C+%E2%88%A0A+%EF%BC%9C+45%C2%B0C.45%C2%B0+%EF%BC%9C+%E2%88%A0A+%EF%BC%9C+60%C2%B0D.60%C2%B0+%EF%BC%9C+%E2%88%A0A+%EF%BC%9C+90%C2%B0------------------------------------)
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