Find the derivative 1 - F ( x) = cos x - 4 tan x secx 2 - f ' (x ) = (x"+ Vx +b where a band n are constant Resolve differential equation 3 - 8 dxa - 2x - 4 - dy . 4 sin ( x ) - ex d x 4 = 3 X = 0 Resolve the suration 5 - 100