1. The problem statement, all variables and given/known data im not sure the elegant way to put it, i need to integrate this somehow (ie, throw over the dt and integrate each side) but that squared is really tripping me up. is there a trick i should be using? -g(cos(x))=r(dx/dt)^2 2. Relevant equations 3. The attempt at a solution my attempt was initially to integrate 1/(cos(x))^(1/2), that is not pretty i heard classmates talking about multiplying though by (dx/dt), not sure if that applies any help appreciated, thanks!