Tangent under the magnifying glass

[b]Task[/b][br]Take the magnifying glass by the [b][color=#b45f06]brown handle[/color][/b] and move it to any interesting position.[br]Use then the slider to decrease Δx.[br][br]Zoom in or out by clicking the [size=85] [button]+[/button] respectivly[/size] [size=85] [button]-[/button] button.[/size]

Information: Tangent under the magnifying glass