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Know
hyperbola. Show its directrixs,
asymptotes and e. F1 and F2 are focus. |
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Circle C pass through point A(0,p),
p>0. The center of the circle is C. C moves in curve x2=2py.
MN is the chord of C cut by X axis. Dynamically show the length
of MN. |
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Know a circle passes
point A(12,3),and its tangent line is straight line 4x+3y-26=0,
tangent point is (5,2).Find the circle equation. |
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Ellipse
 ,
its focuses are F1 and F2, P is point which
can be moved on ellipse. When <F1PF2 is obtuse angle, calculate
the field of P in axis.
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