# How do you convert the rectangular equation to polar form x=4?

$r = \frac{4}{\cos} \theta$

#### Explanation:

the given rectangular equation is
$x = 4$

we use $x = r \cos \theta$

$r \cos \theta = 4$

$r \cancel{\cos} \frac{\theta}{\cancel{\cos}} \theta = \frac{4}{\cos} \theta$

$r = \frac{4}{\cos} \theta$

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