Difference between revisions of "Tangents Tool"
From GeoGebra Manual
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{{Tool|icon=Tool_Tangents.gif|name={{PAGENAME}}|type=special line}} | {{Tool|icon=Tool_Tangents.gif|name={{PAGENAME}}|type=special line}} | ||
| − | : Tangents to a conic section can be produced in several ways (also | + | : Tangents to a conic section can be produced in several ways (see also [[Tangent Command|Tangent]] command): |
:* Selecting a point ''A'' and a conic ''c'' produces all tangents through ''A'' to ''c''. | :* Selecting a point ''A'' and a conic ''c'' produces all tangents through ''A'' to ''c''. | ||
:* Selecting a line ''g'' and a conic ''c'' produces all tangents to ''c'' that are parallel to line ''g''. | :* Selecting a line ''g'' and a conic ''c'' produces all tangents to ''c'' that are parallel to line ''g''. | ||
:* Selecting a point ''A'' and a function ''f'' produces the tangent line to ''f'' in ''x = x(A)''. | :* Selecting a point ''A'' and a function ''f'' produces the tangent line to ''f'' in ''x = x(A)''. | ||
| − | : Note | + | : {{Note| ''x(A)'' represents the ''x''-coordinate of point ''A''. If point ''A'' lies on the function graph, the tangent runs through point ''A''.}} |
Revision as of 18:20, 13 February 2011
- Tangents to a conic section can be produced in several ways (see also Tangent command):
- Selecting a point A and a conic c produces all tangents through A to c.
- Selecting a line g and a conic c produces all tangents to c that are parallel to line g.
- Selecting a point A and a function f produces the tangent line to f in x = x(A).
- Note: x(A) represents the x-coordinate of point A. If point A lies on the function graph, the tangent runs through point A.
