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.
For the sitcom, see Happy Days. Happy Days is a musical with a book by Garry Marshall and music and lyrics by Paul Williams, based on the ABC TV series of the same name. The story is set in approximately during Season 4 of the original sitcom.