Only do C Eand Fthx

48. Each of the following is a pair of equations, which determines r and y in terms of a parameter t E R, which defines a function y(x) implicitly. Find in all cases an expression for dy / dx. (a) T = cos(t), y = sin(t), (b) x = cosh (t), y = sinh(t), * (c) c = t + sin(t), y = cos(t), (d) x =t, y=t, (e ) r = ev, y = tanh(t), *(f) r = e' cos(t), y = e' sin(t)