# Difference between revisions of "Comments:ZoomIn Command"

From GeoGebra Manual

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== Idea of Use == | == Idea of Use == | ||

=== Linear aproximation of a function by its tangent === | === Linear aproximation of a function by its tangent === | ||

− | Create a function f with a point A on it and a button with the code <code>ZoomIn | + | Create a function f with a point A on it and a button with the code <code>ZoomIn(2,A)</code> to see that the function looks equal to the tangent for a big "magnification". Another button with [[ZoomOut Command|ZoomOut]] let you be able to prove this at other positions of the point A. |

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## Latest revision as of 09:26, 12 October 2017

## Idea of Use

### Linear aproximation of a function by its tangent

Create a function f with a point A on it and a button with the code `ZoomIn(2,A)`

to see that the function looks equal to the tangent for a big "magnification". Another button with ZoomOut let you be able to prove this at other positions of the point A.