- #1
Sparky_
- 227
- 5
Homework Statement
Convert into rectangular coordinates:
[tex]
r = \frac {1}{1-cos(theta)}
[/tex]
Homework Equations
The Attempt at a Solution
[tex]
r = \frac {1}{1-cos(theta)}
[/tex]
[tex]
r –r(cos) = 1
[/tex]
(why can't I get a minus sign to display correctly? - I'm trying to show r - r*cos = 1)
I used
[tex]
r = \sqrt {x^2+y^2}
[/tex]
and
[tex]
cos = \frac {x}{r}
x = (r)(cos)
[/tex]
resulting combinations gives:
[tex]
\sqrt {x^2+y^2} – x = 1
[/tex]
(I think) - and again - I'm having a problem (maybe just on my end) displaying a minus sign. I'm seeing "8211" on the screen for the minus sign.
I'm trying to display sqrt(x^2+y^2) - x = 1.
The book gets
[tex]
y^2} = 1 + 2x
[/tex]
I‘ve tried some various algebra stuff but am not getting close to the book’s answer.
Thanks
-Sparky
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