Conics Help (1 Viewer)

[Andy005]

https://drive.google.com/open?id=1tckKJxDql38T785s5GPrq-dPQLgbDpCy

How would I do question 9b?

In particular, how would I calculate secPhi?

 

[Jonomyster]

Not sure what you meant by sec(phi), but here's what I got anway:
Part (a) https://i.imgur.com/O2Ae7sY.png
Part (b) https://i.imgur.com/0tKKBM9.png

 

[Andy005]

I already calculated the coordinates of Q from tan(theta/2)tan(phi/2) = 1-e/1+e, but i don't know how to calculate the coordinates of Q from tan(theta/2)tan(phi/2) = 1+e/1-e.