How do you convert $r cos (θ) = 4$ $rcos(theta) = 4$ into rectangular form?

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Answer 1 · 2015-12-16T16:46:05

Use the identity ...

$x = r cos θ$ $x=rcostheta$ or equivalently $\frac{x}{r} = cos θ$ $x/r=costheta$

Using substitution ...

$r cos θ = 4$ $rcostheta=4$

$r (\frac{x}{r}) = 4$ $r(x/r)=4$

Now, simplify ...

$x = 4$ $x=4$

hope that helped

How do you convert rcos(theta) = 4rcos(θ)=4rcos(theta) = 4 into rectangular form?