Lander leaving Dune going to mother ship

[cygnus008]

I first time landed a crewed lander on Duna and was not very good in the planning. The  mothership is orbiting in a 150 degree inclined orbit at 70 Km. 

1. The lander is setting at an inclination of 28 degrees and is sitting several degrees off to the side of the main ships orbit.  I suspect these numbers aren't important.  I did a save of the game at this point cause I'm sure it is going to take several attempts to get back up in the appropriate orbit with MOM.

I did several launch and hope to be right and was getting closer but I would like to know how to calculate the proper inclination to rendezvous.  

A really really long time ago I had a calculus teacher say know why and how  a formula works just don't use it because it works.  So I'm trying to figure out the how in this circumstance.  I'm not an orbital math engineer and would like some help.  Maybe there is a video that explains all this.

thanks for any help youall give me.

 

[Vanamonde]

I can't do the math so I just go into fast-time until the orbiting ship passes over the landed one.  As long as you didn't have the bad luck to place it in a resonance orbit, the orbiting ship should pass close eventually.