1. The problem statement, all variables and given/known data Find the vectors T, N, and B at the given point. r(t) = (sin(t), cos(t), ln(cos(t))), P = (0,1,0) 2. Relevant equations T(t) = r'(t) / | r'(t) | N(t) = T'(t) / | T'(t) | B(t) = T(t) x N(t) 3. The attempt at a solution I am stuck on how to solve for t. I am not sure how you would calculate for the parameter t in this equation.