HP Prime Graphing Wireless Calculator - Manual (Page 60)

56 Geometry
Coordinates
Given a vector of points, returns a matrix containing the x- and
y-coordinates of those points. Each row of the matrix defines
one point; the first column gives the x-coordinates and the
second column contains the y-coordinates.
coordinates([point1, point2, …, pointn]))
Equation of
Returns the Cartesian equation of a curve in x and y, or the
Cartesian coordinates of a point.
equation(curve) or equation(point)
Example:
If GA is the point at (0, 0), GB is the point at (1, 0), and GC
is defined as circle(GA, GB-GA), then equation(GC)
returns x
2
+ y
2
= 1.
Parametric
Works like the equation command, but returns parametric
results in complex form.
parameq(GeoObj )
Polar Coordinates
Returns a vector containing the polar coordinates of a point
or a complex number.
polar_coordinates(point)
or
polar_coordinates(complex)
Example:
polar_coordinates(√2, √2) returns [2, π/4])
Measure
Distance
Returns the distance between two points or between a point
and a curve.
distance(point1, point2)
or
distance(point,
curve)
Examples:
distance(1+i, 3+3i) returns 2.828… or 2√2.