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sineoko [7]
3 years ago
10

Will give brainliest!!

Mathematics
1 answer:
yawa3891 [41]3 years ago
8 0

Answer:

r=\frac{9\cos \theta}{\sin^2 \theta}

Step-by-step explanation:

The given equation in rectangular coordinates is;

y^2=9x

We use the relation;

x=r\cos \theta

and

y=r \sin \theta

This implies that;

(r \sin \theta)^2=9(r \cos \theta)

r^2 \sin^2 \theta=9r \cos \theta

Divide through by r to get;

r \sin^2 \theta=9\cos \theta

Divide both sides by \sin^2 \theta

r=\frac{9\cos \theta}{\sin^2 \theta}

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