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Please help I believe my answer is b but I'm not sure.

Please help I believe my answer is b but I'm not sure.-example-1
User Ahirapara
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1 Answer

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Given r = -3 + 4 cos 0

To find the when r is maximum

We will find:


(dr)/(d\theta)


\begin{gathered} (dr)/(d\theta)=0+4\cdot(-\sin \theta)=0 \\ -4\sin \theta=0 \\ \sin \theta=0 \end{gathered}

so, Theta = 0 or pi

So, when theta = 0

r = -3 + 4 cos 0 = -3 + 4 = 1

when theta = pi

r = -3 + 4 cos pi = -3 - 4 = -7

As r is the distance from the pole

So, the maximum distance occur at theta = pi

So, the answer is option d. π

User Downatone
by
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