2
QuizMultiple Choice

Graphing Polar Equations — Quiz

Question 2 • Precalculus

Which equation represents the polar form of x squared plus open paren y minus 6 close paren squared is equal to 36 ?

Answer
A
r is equal to 6 cosine theta
B
r is equal to 12 sine theta
C
r is equal to 12 cosine theta
D
r is equal to 6 sine theta

Explanation

Substitute x = r cos θ and y = r sin θ into the equation: r² cos² θ + (r sin θ − 6)² = 36. Expanding and using cos² θ + sin² θ = 1 gives r² − 12r sin θ = 0, so the circle is represented by r = 12 sin θ. This is choice C.

AI-written and checked against the verified answer.

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