AB is a diameter of the ellipse the eccentric angle at A is . Find
a) the eccentric angle of B
b) the equations of the tangent at A and B
c) the equation of the conjugate diameter
I found correctly the eccentric angle of B to be
When I did (b) and (c), I used to find the gradient of the tangent and conjugate diameter.
But I found that in the answers the gradients are all which is the gradient of the diameter AB.
I used the equation for tangents
Have I misunderstood something?