In the attachment.
The Attempt at a Solution
First of all, sorry for the English, I'm from Israel, speak Hebrew here.
Ok, I found v = (-w*R*sin(wt), w*R*cos(wt)), a = (-w^2 * R*cos(wt), -w^2*R*sin(wt)).
I did tg to ay / ax and found the angle of a.
The problem is when I do tg to v, I come out with tg = -ctg, how can I solve that?
Hope u got it, 10x in advance.
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