HP Prime Graphing Calculator - Manual (Page 378)

374 Functions and commands
< Strict inequality test. Returns 1 if the inequality is true, and 0
if the inequality is false. Note that more than two objects can
be compared. Thus 6 < 8 < 11 returns 1 (because it is true)
whereas 6 < 8 < 3 returns 0 (as it is false).
<= Inequality test. Returns 1 if the inequality is true, and 0 if the
inequality is false. Note that more than two objects can be
compared. See comment above regarding <.
<> Inequality test. Returns 1 if the inequality is true, and 0 if the
inequality is false.
= Equality symbol. Connects two members of an equation.
== Equality test. Returns 1 if the equality is true, and 0 if the
equality is false.
> Strict inequality test. Returns 1 if the inequality is true, and 0
if the inequality is false. Note that more than two objects can
be compared. See comment above regarding <.
>= Inequality test. Returns 1 if the inequality is true, and 0 if the
inequality is false. Note that more than two objects can be
compared. See comment above regarding <.
^ Inserts the power symbol.
a2q Returns the symbolic expression in quadratic form in the
variables given in VectVar of the symmetric matrix A.
a2q(MtrxA,VectVar)
Example:
a2q([[1,2],[4,4]],[x,y])
gives
x^2+6*x*y+4*y^2
abcuv Returns the polynomials U and V such that for polynomials A,
B and C, PU+QV=R. With only polynomials as arguments, the
variable used is x. With a variable as the final argument, the
polynomials are expressions of it.
abcuv(Poly(A),Poly(B),Poly(C),[Var])
Example:
abcuv(x^2+2*x+1,x^2-1,x+1)
gives
[1/2,(-1)/2]
ACOS Arc cosine: cos –1 x.
ACOS(value)