<prompt> Rahisishafracsin x sin 2x1 cos x cos 2x.  <response>: Tunaweza kuandikaanzaalignfracsin x sin 2x1 cos x cos 2x fracsin x 2 sin x cos x1 cos x 2 cos 2 x - 1 fracsin x 2 sin x cos xcos x 2 cos2 x fracsin x 1 2 cos xcos x 1 2 cos x fracsin xcos x tan x.mwishopanga 