Find the exact area of the surface obtained by rotating the curve about the x-axis. y = cos(1/2x), 0 ≤ x ≤ π

rotating-the-curve
y-cos12x-0-x

#1

Find the exact area of the surface obtained by rotating the curve about the x-axis.
y = cos(1/2x), 0 ≤ x ≤ π

Answer: