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.
Examples of Davis's river ages include: 1  Youthful river: A river with a steep gradient that has very few tributaries and flows quickly. 2  Mature river: A river with a gradient that is less steep than those of youthful rivers and flows more slowly. 3  Old river: A river with a low gradient and low erosive energy.