Question

change y=3x^2 +1 into polar form

Answer 1

what do x,y equal in polar cord? \[x=r\cos\theta \text{ and } y = ?\]

Answer 2

\[y=r \sin \theta\]

Answer 3

@Redcan

Answer 4

ok, now sub the new equations into the original

Answer 5

\[rsin \theta =3\cos \theta ^2+1\]

Answer 6

Yep, \[r\sin\theta=3(r\cos\theta)^2+1\]

Answer 7

yes

Answer 8

then what

Answer 9

now you can simplify if you want... recall \[sin^2\theta + \cos^2\theta = 1\]

Answer 10

okay

Answer 11

so replace the cos^2 with 1

Answer 12

Um, nope. we would need a sin^2 as well to do that.