In this post I will explore the LDS concept of the Godhead and God, and give a justification for our use of monotheistic language.
Our first article of faith says, “We believe in God, the Eternal Father, and in His Son, Jesus Christ, and in the Holy Ghost” (AoF 1:1). These persons constitute the Godhead. Along with our Christian cousins we believe Father, Son, and Holy Ghost are distinct from each other. Where we differ is in how we constitute the persons of the Godhead, both individually and as God. The orthodox Godhead consists of one divine essence; the persons of the Trinity are of this essence; thus each is God. It would thus be inappropriate to think of the Godhead as a tripartite counsel: for there is only one God. In the Mormon view the Godhead is definitely tritheistic—it consist of three beings who is each a God. Joseph Smith taught,
[An] everlasting covenant was made between three personages before the organization of this earth…[they] are called God the first, the Creator; God the second, the Redeemer; and God the third, the witness or Testator. (Teachings of the Prophet Joseph Smith, p. 190)