### Home > PC3 > Chapter 11 > Lesson 11.1.4 > Problem11-74

11-74.

Rewrite each of the following equations in rectangular form.

1. $r = 6\sec(θ)$

$r=\frac{6}{\cos(\theta)}$

$r\cos(\theta)=6$

1. $r + 3\sin(θ) = 0$

In order to rewrite the equation, you need $r^{2}$ and $r\sin(θ)$ .
Multiply both sides of the equation by $r$.

1. $r(2\cos(θ) + \sin(θ)) = 4$

Distribute the $r$.