See also : ?? for plane geometry and
?? for 3D geometry.
tangent takes two arguments : an geometric object and a point
A.
tangent draws tangent(s) to this geometric object crossing through
A. If the geometric object is the graph G of a 2D function,
the second argument is either, a real number x0, or a
point A on G. In that case tangent draws a tangent to this
graph G crossing through the point A or through the
point of abscissa x0.
For example, define the function g
g(x):=x^2
then the graph G={(x,y)∈ ℝ2, y=g(x)} of g and a point A on the graph G:
If we want to draw the tangent at the point A to the graph G, we will input:
or :
For the equation of the tangent line, input :