Hey!There

To find equation of tangent at point,you need slope of tangent line and one point..But you have point and you need to find slope of tangent line.This you can find easily by differentiating the above equation with respect to 'y'.And then find derivative at given point this will be your required slope..Obtain the equation of line by slope and point i.e y-y1=m.(x-x1)..

Ask if any query.