The function is and the point is
.
Apply derivative on each side with respect to .
Apply product rule of differentiation : .
.
Find the slope at point .
Slope of the tangent at point is the derivative of the function at that point.
\Substitute and
in
.
.
Slope of the tangent at point is
.
Find the tangent line equation.
\Point-slope form of line equation .
Substitute and
in the point slope form.
.
The tangent line equation is .
The tangent line equation is .