Difference between revisions of "Locus Tool"

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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).  
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::* 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 08:11, 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 Tool New Point.gifNew Point tool; see Point command).
  • Create point B = (x(A), f'(x(A))) that depends on point A.
  • Select tool Tool Locus.gif 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.


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