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7.4_bzat4e

# 7.4_bzat4e - r 4(1 cos θ =-Example 2 Test for symmetry and...

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Section 7.4 Graphs of Polar Equations

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Using Polar Grids to Graph 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 to graph polar equations. θ

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Graphing a Polar Equation by Point Plotting
Graphing r=4 cos θ

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Graphing A Polar Equation Using Symmetry

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Checking for Symmetry

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Example Test for symmetry and then graph the equation r 3 cos θ = +

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Example Test for symmetry and then graph the equation r sin 2 θ =
Example Test for symmetry and then graph the equation

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Unformatted text preview: r 4(1 cos ) θ =-Example 2 Test for symmetry and then graph the equation r cos 2 θ = Test for symmetry about the polar axis on r=2+cos θ (a) It is symmetric. (b) It definitely is not symmetric. (c) It may or may not be symmetric. Test for symmetry about the line = on 2 r=2+cos π θ (a) It is symmetric. (b) It definitely is not symmetric. (c) It may or may not be symmetric. Test for symmetry about the on r=2+cos pole θ (a) It is symmetric. (b) It definitely is not symmetric. (c) It may or may not be symmetric....
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7.4_bzat4e - r 4(1 cos θ =-Example 2 Test for symmetry and...

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