At timet, the position of a particle moving on a curve is given by

(a) Find the exact value oftat which the curve has a horizontal tangent.

t=

(b) Finddy/dxin terms oft.

dy/dx= (6exp(2t)-2exp(-2t))/(2exp(2t)+2exp(-2t))

(c) Find .

ok so i was able to find dy/dx, but i need help with the rest...thanks...