已知圆C:x^2+y^2-4x-6y+12=0 (1)求过点A(1,5)的圆C的切线方程 (2)求在两坐标轴上截距之和为0,且截圆C所得弦长为1的直线方程
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![已知圆C:x^2+y^2-4x-6y+12=0 (1)求过点A(1,5)的圆C的切线方程 (2)求在两坐标轴上截距之和为0,且截圆C所得弦长为1的直线方程](/uploads/image/z/3775024-64-4.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9C%86C%3Ax%5E2%2By%5E2-4x-6y%2B12%3D0+%281%29%E6%B1%82%E8%BF%87%E7%82%B9A%EF%BC%881%2C5%EF%BC%89%E7%9A%84%E5%9C%86C%E7%9A%84%E5%88%87%E7%BA%BF%E6%96%B9%E7%A8%8B+%282%29%E6%B1%82%E5%9C%A8%E4%B8%A4%E5%9D%90%E6%A0%87%E8%BD%B4%E4%B8%8A%E6%88%AA%E8%B7%9D%E4%B9%8B%E5%92%8C%E4%B8%BA0%2C%E4%B8%94%E6%88%AA%E5%9C%86C%E6%89%80%E5%BE%97%E5%BC%A6%E9%95%BF%E4%B8%BA1%E7%9A%84%E7%9B%B4%E7%BA%BF%E6%96%B9%E7%A8%8B)
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