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Definition of an even function: f(­x) = f(x)
Symmetry of an even function: y ­ axis
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Mathlab 6.3 questions
Which trig functions are even?
Use a graph to illustrate the symmetry of an
even function
Definition of an odd function: f(­x) = ­f(x)
Symmetry of an odd function: origin
Which trig functions are odd?
Use a graph to illustrate the symmetry of an
odd function
6.4 Graphing Polar Equations
A polar equation is an equation whose variables are r and The graph of a polar equation is the set of all points whose
polar coordinates satisfy the equation.
We use polar grids like the
one in the figure to graph
polar equations.
Graph r=5cosθ
a is the diameter of the circle.
changing a to ­a will result in a reflection over the polar axis
Determine if the equation
has Polar Axis symmetry.
Determine if the equation
has Line
symmetry.
What kind of symmetry
does r = 4sin2θ have?
Pg. 723 9 - 30 by 3 Test for symmetry only
include graph on 18 and 24