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.
day-to-day - of or belonging to or occurring every day; daily routine; a daily paper. daily, day-after-day, day-by-day. periodic, periodical - happening or recurring at regular intervals; the periodic appearance of the seventeen-year locust.