Area Between Curves Sketch the region bounded by the given curves and find its area. by = X , y = 4x - x a f(x) = - sin x, g(x) = -2sin x, on [0, 2x] a f(x) = sin x, g(x) = cos(2x), on [0. =] 4 x=9- y , x+9=> MAT 271 $6 1: Ammu Between Curves and $6.5: Average Value of a Function