Difference between revisions of "Locus Tool"
From GeoGebra Manual
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: {{Example| 1=<br /> | : {{Example| 1=<br /> | ||
::* Type <code>f(x) = x^2 – 2 x – 1</code> into the ''Input Bar'' and press the'' Enter-key''. | ::* Type <code>f(x) = x^2 – 2 x – 1</code> into the ''Input Bar'' and press the'' Enter-key''. | ||
− | ::* Place a new point ''A'' on the ''x''-axis (see [[New Point Tool|New Point]] tool; see [[Point Command|Point]] command). | + | ::* Place a new point ''A'' on the ''x''-axis (see [[Image:Tool New Point.gif]][[New Point Tool|New Point]] tool; see [[Point Command|Point]] command). |
::* Create point <code>B = (x(A), f'(x(A)))</code> that depends on point ''A''. | ::* Create point <code>B = (x(A), f'(x(A)))</code> that depends on point ''A''. | ||
::* Select tool [[Image:Tool_Locus.gif]] and successively click on point ''B'' and point ''A''. | ::* Select tool [[Image:Tool_Locus.gif]] and successively click on point ''B'' and point ''A''. |
Revision as of 07:11, 8 July 2011
- Select a point B that depends on another point A and whose locus should be drawn. Then, click on point A to create the locus of point B (see also Locus command).
- Note: Point A has to be a point on an object (e. g. line, segment/interval, circle).
- Example:
- Type
f(x) = x^2 – 2 x – 1
into the Input Bar and press the Enter-key. - Place a new point A on the x-axis (see New Point tool; see Point command).
- Create point
B = (x(A), f'(x(A)))
that depends on point A. - Select tool and successively click on point B and point A.
- Drag point A along the x-axis to see point B moving along its locus line.
- Type