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.
Paul Robeson's alterations to the song lyrics[edit] Beginning about 1938, and continuing on to the end of his career, Paul Robeson changed a few of the lyrics of Ol' Man River when singing it at recitals, though never in actual stage performances of Show Boat, and not in the 1936 film version.