Cot x is 1/tan x or cos x / sin x or +- sqrt cosec^2 x -1.
Original Cast Recording. Arista, 1973. Includes original hit song Day by Day sung by Robin Lamont. Sung by the original cast members David Haskell, Peggy Gordon, Robin Lamont, Gilmer McCormick, Sonia Manzano, Jeffrey Mylett, Stephen Nathan, Herbie Braha, Joanne Jonas, and Lamar Alford.
One Day at a Time[edit] Valerie Bertinelli in One Day at a Time in 1975. Following her appearance in an episode of Apple's Way, Bertinelli was approached by producer Norman Lear to audition for the role of cooperative daughter Barbara Cooper in a new sitcom called One Day at a Time. The show debuted in late 1975.