I'm doing an extra credit problem for math, we haven't learned too much on this topic.
The instructions are: Write parametric equations for the given polar equation.
The problem is: $r = 5\sin\theta$
The answer is: $x = 5(\cos\theta)(\sin\theta)$, $y = 5(\sin^2\theta)$
How do I get there? I thought I'd find the rectangular form and I ended up with the equation: $x^2 + (y - 2.5)^2 = 6.25$ .. but that got me nowhere near the answer.