A sound engineer uses a cardioid microphone to record a musical performance. The microphone records sounds according to the equation r = 12 + 12sin(θ), where r is measured in meters.
What does the sum of the constant, 12, and the coefficient, 12, in the equation represent?
a) The maximum possible distance between the performer and microphone
b) The minimum possible distance between the performer and microphone
c) One half the maximum possible distance between the performer and microphone
d) One half the minimum possible distance between the performer and microphone