The functions are
and
.
Find intersection points.
\Substitute
in
.

,
,
and
.
imaginary oots are not constder ,hence
and
.
At
,

At
,

The intersection points are
and
.
The functions is
.
Differentiate on each side with respect to
.


At point
,
slope is
.
The slope point form is
.
Substitute
,
and
in
.

At point
the tangent line is
.
The functions is
.
Differentiate on each side with respect to
.

.
The slope
.
At point
,
slope is
.
The slope point form is
.
Substitute
and
in
.

At point
the tangent line is
.
Graph:
\
Observe from the graph :
\Both the tangents are orthogonal to each other.
\