HP NW280AAABA Manual do Utilizador descarregar pdf (Página 187)

100

101

Geometry 183

affix

Returns the coordinates of a point or both the x- and y-lengths

of a vector as a complex number.

affix(point) or affix(vector)

Example:

if GA is a point at (1, –2), then affix(GA) returns 1–2i.

angle

Returns the measure of a directed angle. The first point is

taken as the vertex of the angle as the next two points in order

give the measure and sign.

angle(vertex, point2, point3)

Example:

angle(GA, GB, GC) returns the measure of ∡ BAC.

arcLen

Returns the length of the arc of a curve between two points on

the curve. The curve is an expression, the independent

variable is declared, and the two points are defined by values

of the independent variable.

This command can also accept a parametric definition of a

curve. In this case, the expression is a list of 2 expressions (the

first for x and the second for y) in terms of a third independent

variable.

arcLen(expr, real1, real2)

Examples:

arcLen(x^2, x, –2, 2) returns 9.29….

arcLen({sin(t), cos(t)}, t, 0, π/2) returns

1. 57 …

area

Returns the area of a circle or polygon.

area(circle) or area(polygon)

This command can also return the area under a curve

between two points.

area(expr, x=value1..value2)

1 2 ... 182 183 184 185 186 187 188 189 190 191 192 ... 615 616

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