To achieve this you have 2 options depending on your resources, fist option is to hold your workpiece at desired angle and then machine your root dimension, put root dimension geometry into a LBL. Then calculate your incremental movements from your second angle and z dimensio(depending on depth of cut, Rough finish etc etc. ) tan of angle x distance. This method could prove too many setups..REcal your lbl required amount....
second opyion if job is more complex...You must create your geometry then substitute certain values with Q deffinition..... Q defination are mathematical formula Wich when used with a lbl repeat or incremental movement can REproduce almost anything..ha ha. suggest reading the machine manual on Q-defs elipse etc.