calculus help...last two questions...

Question

anonymous · Answer

http://assets.openstudy.com/updates/attachments/517d65e4e4b0be6b54ab31bc-best_mathematician-1367172592503-3.png

anonymous · Answer

@electrokid can u help me with last two

anonymous · Answer

how were you able to solve the first ones?
You have to picture it and draw it first. Just a little bit of imagination gives the answer right away.

fibonaccichick666 · Answer

so you got the first three right? now you want a function that shows $$2[  \mathsf { {r}}(t)]$$  So what was our original r(t)

fibonaccichick666 · Answer

btw this isn't dif eq

anonymous · Answer

r(t) = (t-sint)i + (1-cost)j
so if it is 2[r(t)] = (2t-2sint)i + (2-2cost)j
is it correct?

anonymous · Answer

i am not smart

anonymous · Answer

@electrokid is this what you talking about?
|dw:1367589459350:dw| i got this part but what abt rest part

@FibonacciChick666 
r(t) = (t-sint)i + (1-cost)j
so if it is 2[r(t)] = (2t-2sint)i + (2-2cost)j
is it correct?