- Feb 22, 2012
"find a unit tangent vector and the equation of the tangent line to the curve r(t) = (t, t^2, cost), t>=0 at the point r(pi/2)." NOW, what I don't get is, how is that a curve? This is not like the example I have studied and I don't really get the question. So I don't know where to start. Once I find a starting point I can probably do it but I don't recognise the form of the problem which is a major issue. Any hinters? Gracias.