# Thread: help with this equation

1. ## help with this equation

Can any one help me with these equations. And help me to graph it too.

2. Originally Posted by qwertypunk
Can any one help me with these equations. And help me to graph it too.

Um, both equations are the same so what do you want done with them?

As for the graphing, what does the graph of
$r_{xy}(t) = a~cos(t) \hat{i} + a~sin(t) \hat{j}$
the projection of the graph of r(t) onto the xy plane, look like? What does the $t \hat{k}$ do to this graph?

-Dan

3. ## sorry made small mistake with equation

sorry i wrote the equation twice but i have already replaced it.