(a). Show that π∫0 ln (sin x) dx is convergent.
(b). Show that
π∫0 ln (sin x) dx = 2 π/2 ∫0 ln (sin x) dx + 2 2 π/2 ∫0 ln (cos x) dx + π ln 2.
(c) Compute π∫0 ln (sin x) dx