Sage Parashara solves the mind-boggling puzzle of Rahu & Ketu in two verses. All students must keep them in mind.
(i) The nodes give predominantly the effects as due to their conjunction with a house-lord or as due to the house they occupy, or
(ii) If a node in an angle in aspect to or association with a trinal lord or be in a trine in similar relation with an angular lord, it will become Yogakaraka.
BPHS (34.13-14), Prof. R.Santhanam, Vol I, Pg 346