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Polar Coordinates - PreCalc Chp. 9
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Gravity
Terms in this set (9)
Cardioid
R= a + bcos x.
A heart shaped curve on polar axis.
Lemniscate
r²=a² cos(2Θ
pole
a fixed point 0 at origin
polar axis
initial ray from a pole, usually horizontal to the right
polar coordinates
describes the location of a point P(r, theta) in the polar coordinate system, where r is the directed distance from the pole 0 to the point and theta is the directed angle from the polar axis to OP
polar equation
an equation expressed in terms of polar coordinates
polar equation
set of all points with coordinates (r, theta)
limacon
the graph of a polar equation of the form r=a±bcos θ or r=a±bsin θ, where a and b are both positive
Roses
Can have 3 or more equal loops and uses the polar axis of symmetry to complete the graph
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