1. Differentiate: (K) a) f (x) = sin (x' -2x+4) b) f (x) = cossin 2x (2,2) c ) f (x) = e" (cos x + sin x) (3) d) f ( x ) = elan Vx (3) 2 . Find an equation for the tangent line to f (x) = 2sin xcosx when x =- (5A) (1C) 3. Determine the absolute maximum and the absolute minimum values of the function f (x) =(x+2)e-2* on the interval [-4, 4]. (6P) (2C)