To fill: What has to be replaced to test whether the graph of a polar equation may be symmetric with respect to the polar axis instead θ.
Solution:
To test whether the graph of a polar equation may be symmetric with respect to the polar axis instead of θ by − θ.
Given:
Statement asked the replacement term to test whether the graph of a polar equation may be symmetric with respect to the polar axis instead of θ.
Test for symmetry:
Symmetry with respect to the polar axis (x-Axis):
In a polar equation, replace θ by − θ. If an equivalent equation results, the graph is symmetric with respect to the polar axis.
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