HP Prime Graphing Calculator - Manual (Page 426)

422 Functions and commands
TO Used in programming in a loop when expressing the range of
values of a variable for which a statement should be executed.
translation With a vector and a point as arguments, returns the point
translated by the vector. With two points as arguments, returns
the second point translated by the vector from the origin to the
first point.
translation(Vect,Pnt(C))
Example:
translation(0-i,GA)
translates object A down one
unit
transpose Returns a matrix transposed (without conjugation).
transpose(Mtrx)
Example:
tran([[1,2,3],[1,3,6],[2,5,7]])
gives
[[1,1,2],[2,3,5],[3,6,7]]
triangle Draws a triangle with vertices at the three points.
triangle((Pnt or Cplx),(Pnt or Cplx),(Pnt or
Cplx))
trunc Returns a value or a list of values truncated to n decimal
places. If n is not provided, it is taken as 0. Accepts complex
numbers.
trunc(Real||LstReal,Int(n))
Example:
trunc(4.3)
gives
4
tsimplify Returns an expression with transcendentals rewritten as
complex exponentials.
tsimplify(Expr)
Example:
tsimplify(exp(2*x)+exp(x))
gives
exp(x)^2+exp(x)
type Returns the type of an expression (e.g. list, string).
type(Expr)
Example:
type("abc")
gives
DOM_STRING