Conics
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18 Terms
1
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x² = 4py
opens UP
2
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x² = - 4py
opens DOWN
3
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y² = 4px
opens RIGHT
4
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y² = - 4px
opens LEFT
5
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x² term first (assuming positive)
opens left and right
6
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y² term first (assuming positive)
opens up and down
7
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discriminant positive
hyperbola
8
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discriminant positive
ellipse
9
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discriminant 0
parabola
10
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circle eccentricity
0
11
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parabola eccentricity
1
12
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ellipse eccentricity
between 0 and 1
13
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hyperbola eccentricity
greater than 1
14
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definition of discriminant
B² - (4ac)
15
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Angle of rotation definition
Cot 2(°)= (A-C) / B
16
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Ellipse pyth properties
a² = b² + c²
A is ALWAYS bigger than B
2A = the MAJOR AXIS
17
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Eccentricity equation
PF/PD (point-focus/point-directrix)
18
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Hyperbola 2a
Difference of the distances of foci to point
Note 
Flashcards (167)