cot x can be rewritten as cos x / sin x so, sin x + cos x. cosx / sin x sin x + (cos x)^2 / sin x Then if you multiply by sin x... sin x. sin x + sinx. (cos x)^2 / sin x which becomes (sin x)^2 + (cos x)^2 I'll leave the honors to you.
Old Man River. NOTE Old Man River was a standard part of Robeson's repertoire and appears on many of his albums. It also became William Warfield's signature song. Show Boat's 1927 premiere announced the advent of a new kind of musical. For the first time, characters developed and matured.
SONG Old Man River. WRITTEN BY Oscar Hammerstein II and Jerome Kern. PERFORMED BY Paul Robeson, William Warfield, The Temptations, many others. APPEARS ON Songs of Free Men (Robeson, 1997), Show Boat: Original Motion Picture Soundtrack (1951, remastered 1995); In A Mellow Mood (1967, The Temptations)