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.
Jerome Kern and the lyricist Oscar Hammerstein II underscored the musical's racial themes by closing the entire show with a reprise of the first act's leitmotif, the song Ol' Man River.. Ol' Man River, thus treated as the show's unifying theme, is a melody first sung by one of the African-American dockworkers.