已知圆C:(x+4)^2+y^2=4,圆D的圆心D在Y轴上且与圆C外切,圆D与Y轴交于A、B两点,且点P(-3,0)1、若点D在Y轴上运动时,求∠APB的最大值2、在X轴上是否存在点Q,当圆D在Y轴上运动时,∠AQB为定值?若存在,
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![已知圆C:(x+4)^2+y^2=4,圆D的圆心D在Y轴上且与圆C外切,圆D与Y轴交于A、B两点,且点P(-3,0)1、若点D在Y轴上运动时,求∠APB的最大值2、在X轴上是否存在点Q,当圆D在Y轴上运动时,∠AQB为定值?若存在,](/uploads/image/z/15254259-51-9.jpg?t=%E5%B7%B2%E7%9F%A5%E5%9C%86C%EF%BC%9A%28x%2B4%29%5E2%2By%5E2%3D4%2C%E5%9C%86D%E7%9A%84%E5%9C%86%E5%BF%83D%E5%9C%A8Y%E8%BD%B4%E4%B8%8A%E4%B8%94%E4%B8%8E%E5%9C%86C%E5%A4%96%E5%88%87%2C%E5%9C%86D%E4%B8%8EY%E8%BD%B4%E4%BA%A4%E4%BA%8EA%E3%80%81B%E4%B8%A4%E7%82%B9%2C%E4%B8%94%E7%82%B9P%EF%BC%88-3%2C0%EF%BC%891%E3%80%81%E8%8B%A5%E7%82%B9D%E5%9C%A8Y%E8%BD%B4%E4%B8%8A%E8%BF%90%E5%8A%A8%E6%97%B6%2C%E6%B1%82%E2%88%A0APB%E7%9A%84%E6%9C%80%E5%A4%A7%E5%80%BC2%E3%80%81%E5%9C%A8X%E8%BD%B4%E4%B8%8A%E6%98%AF%E5%90%A6%E5%AD%98%E5%9C%A8%E7%82%B9Q%2C%E5%BD%93%E5%9C%86D%E5%9C%A8Y%E8%BD%B4%E4%B8%8A%E8%BF%90%E5%8A%A8%E6%97%B6%2C%E2%88%A0AQB%E4%B8%BA%E5%AE%9A%E5%80%BC%3F%E8%8B%A5%E5%AD%98%E5%9C%A8%2C)
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