Inverse Trig Functions
The six functions sin-1,
These are also written arcsin, arccos, arctan, arccsc, arcsec,
Technical note: Since none of the six trig
cosine, tangent, cosecant, secant, and cotangent are one-to-one,
their inverses are not functions. Each trig
function can have its
domain restricted, however, in order to make its inverse a function.
Some mathematicians write these restricted trig functions and their
inverses with an initial capital letter (e.g. Cos or Cos-1).
However, most mathematicians do not follow this practice. This
website does not distinguish between capitalized and uncapitalized