(1) Find the first derivative with respect to x (a) f(x) = 3 cos(x cos ); (b) f(x)==0 (c) f(x) = (2i+ 3x) exp(2x); (d) fs(x) = ln[(2x + x) sin(1/x )]; (n! = 1-2-3 b) 1 = fo dx a (c) 13 = dx x+3x+2 and 0! = 1), (11) Evaluate the following integrals. a) I = f dx exp(-2x) f4(x) = sin x sinhx fo(x, y) = In[(2x+y) sin(1/y)] Question 4: Differential Equations Solve y" (t) + y = G cosht (#00), y(0) = 0, y'(0) = 0