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.
River Song (Doctor Who) River Song is a fictional character created by Steven Moffat and played by Alex Kingston in the British science-fiction series Doctor Who. River Song was introduced to the series as an experienced future companion of series protagonist the Doctor, an alien Time Lord who travels through time in his TARDIS.