∫(0→π) (1 - sin³x) dx= ∫(0→π) dx - ∫(0→π) sin³x dx= [ x ] |(0→π) + ∫(0→π) (1 - cos²x) d(cosx)= π + [ (cosx - 1/3 * cos³x) ] |(0→π)= π + [(- 1) - (1/3)(- 1)] - [(1...