Question

Convert to rectangular coordinates: r+rcos(theta)=3

Answer 1

Use thees relations...
\[\huge r=\sqrt{x^2+y^2}\]
and
\[\huge \cos(\theta) = \frac{x}r\]

This particular one isn't relevant here, but it might be useful somewhere else in your coursework...
\[\huge \color{blue}{\sin(\theta) = \frac{y}{r}}\]

Answer 2

rats...
Use *these* relations

Answer 3

I know those relations. I just don't know how to solve this problem.

Answer 4

Okay...
\[\huge \color{red}r +r\color{green}{\cos(\theta)} = 3\]

And replace accordingly...
\[\huge \color{red}{r=\sqrt{x^2+y^2}}\]
\[\huge \color{green}{\cos(\theta) = \frac{x}r}\]
Or more directly...
\[\huge r\color{green}{\cos(\theta)}=\color{black}x\]

Answer 5

okay thanks I got it

Answer 6

btw your responses are oh so nice and colorful

Answer 7

I love emphasis :)