1. Find assuming y = y(x) a function of x, find dy/dx implicitly where It cos(xy) = x2 + y then find the tangent line at (0, It ). 2. Assuming both x = x(t) and y = y(t) are functions in t and that y2 = e2x + x2 + y, find dy/dt when x = 1, y = 2 and that dx/dt = 2