The equation of circle is
and the slope
.
The equation is
.
Apply derivative on each sdie with respect to
.



.
The derivative of the equation is equal to the slope of the equation.
\Equate the above equation to
.

.
Substitute
in the equation
.



Substitute
in the equation
.

Substitute
in the equation
.

The points are
and
.
The points are
and
.