The area of the region bounded by the curve y2 = 4x and the X-axis between x = 0 and x = 1 is:

What is the area bounded by the curves y = x2 and y = 2|x| between the lines x = 0 and x = 1?

Let k be the area between the curve y = sin x and the x-axis in the interval [0, π/4]. What is the area between the curve y = cos x and the x-axis in the interval [π/4, π/2]?