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 is an American situation comedy on the CBS network that aired from December 16, 1975, until May 28, 1984. The show was based on Whitney Blake's (One of the shows creators) own life as a single mother, raising her child, future actress Meredith Baxter.