APFIVE Polar Curve Tangent Line Slope
What is the slope of the line tangent to the polar curve $$r = 3\theta$$ at the point where $$\theta = \frac{\pi}{2}$$?
A
$$3$$
B
$$-\dfrac{2}{\pi}$$
C
$$-\dfrac{\pi}{2}$$
D
$$0$$
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