The and
.
Find intersection points.
\Substitute in
.
.
Solutions for the equation is .
The intersection points is .
The curve equation is .
Differentiate on each side with respect to .
At point , slope of the tangent line is
.
The point-slope form of line equation is .
Substitute is
and
in the point slope form..
The tangent line equation is .
The curve equation is .
Differentiate on each side with respect to .
.
At point , slope of the tangent line is
.
The point-slope form of line equation is .
Substitute is
and
in point slope form.
The tangent line equation is .
Graph:
\Observe from the graph :
\Both the tangents are perpendicular to each other.
\The two curve equations are orthogonal to each other.
\The two curve equations are orthogonal to each other.