How do you convert $r cos(θ) = 9$ to rectangular form?

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Answer 1 · 2018-05-14T08:57:08

$x=9$

We simply change $rcostheta$ to $x$ , since there are four identities:
$x=rcostheta$
$y=rsintheta$
$r^2=x^2+y^2$
$tantheta=y/x$

In this case we have:
$x=rcostheta=9$
$x=9$

How do you convert r cos(θ) = 9r cos(θ) = 9 to rectangular form?