1.在RT△ABC中,斜边AB=5,两直角边BC、AC之长是一元二次方程x^2-(2m-1)x+4(m-1)=0的两根 求实数m的值2.已知a是锐角,按下列条件分别计算或求值:(1)一直cos a+1/2tan a=1/cos a,求a的度数(2)已知2+根号3
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![1.在RT△ABC中,斜边AB=5,两直角边BC、AC之长是一元二次方程x^2-(2m-1)x+4(m-1)=0的两根 求实数m的值2.已知a是锐角,按下列条件分别计算或求值:(1)一直cos a+1/2tan a=1/cos a,求a的度数(2)已知2+根号3](/uploads/image/z/10247335-7-5.jpg?t=1.%E5%9C%A8RT%E2%96%B3ABC%E4%B8%AD%2C%E6%96%9C%E8%BE%B9AB%3D5%2C%E4%B8%A4%E7%9B%B4%E8%A7%92%E8%BE%B9BC%E3%80%81AC%E4%B9%8B%E9%95%BF%E6%98%AF%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8Bx%5E2-%282m-1%29x%2B4%28m-1%29%3D0%E7%9A%84%E4%B8%A4%E6%A0%B9+%E6%B1%82%E5%AE%9E%E6%95%B0m%E7%9A%84%E5%80%BC2.%E5%B7%B2%E7%9F%A5a%E6%98%AF%E9%94%90%E8%A7%92%2C%E6%8C%89%E4%B8%8B%E5%88%97%E6%9D%A1%E4%BB%B6%E5%88%86%E5%88%AB%E8%AE%A1%E7%AE%97%E6%88%96%E6%B1%82%E5%80%BC%EF%BC%9A%EF%BC%881%EF%BC%89%E4%B8%80%E7%9B%B4cos+a%2B1%2F2tan+a%3D1%2Fcos+a%2C%E6%B1%82a%E7%9A%84%E5%BA%A6%E6%95%B0%EF%BC%882%EF%BC%89%E5%B7%B2%E7%9F%A52%2B%E6%A0%B9%E5%8F%B73)
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