Consider the following equation.
r = 10 + 7 cos θPerform the test for symmetry with respect to the polar axis, the line θ = π/2, and the pole.

• A. Symmetry with respect to the polar axis only
• B. Symmetry with respect to the line θ = π/2 only
• C. Symmetry with respect to the line θ = π/2 and the pole
• D. No symmetry

Answer: (A)