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Tangent to a 2D graph : LineTan

LineTan takes two arguments : an expression Ex of the variable x and a value x0 of x.
LineTan draws the tangent at x = x0 to the graph of y = Ex.
Input :
LineTan(ln(x),1)
Output :
the line y=x-1
Input :
equation(LineTan(ln(x),1))
Output :
y=(x-1)



giac documentation written by Renée De Graeve and Bernard Parisse