- #1
motornoob101
- 45
- 0
So if I have something like this..
[tex]rcos\theta =-r^{2}sin^{2}\theta[/tex]
I can cancel out one of the r to get
[tex]cos\theta = rsin^{2}\theta[/tex]
but how come when you have something like..
[tex]sin^2\theta = sin\theta[/tex]
and say you are trying to find the zeros of this equation, you can't just do
[tex]sin\theta = 1[/tex]
Is it because in the first example, we assume that r never = 0 so you can cancel it out where as in the [tex]sin\theta [/tex] example, it could be 0? Thanks.
[tex]rcos\theta =-r^{2}sin^{2}\theta[/tex]
I can cancel out one of the r to get
[tex]cos\theta = rsin^{2}\theta[/tex]
but how come when you have something like..
[tex]sin^2\theta = sin\theta[/tex]
and say you are trying to find the zeros of this equation, you can't just do
[tex]sin\theta = 1[/tex]
Is it because in the first example, we assume that r never = 0 so you can cancel it out where as in the [tex]sin\theta [/tex] example, it could be 0? Thanks.