closed as unclear what you're asking by Matthias Kuhn, John Powell, Evil Genius, Mapperz♦ Oct 9 '15 at 13:35
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I don't have a programmed solution for you, but here are some considerations:
Limit the dataset
Find the sectors that are within a certain distance to limit your dataset to search
Find the sectors that point to the point
Now you need to figure out if the sectors are pointing in the direction of the point you are at. I an see at least two ways:
2a. Calculate the bearing from the sector to the point and see if that bearing lies within the coverage bearing of the sector.
2b. For all sectors you can create a polyline x meters out covering the bearing this sector points towards. Have a look at this answer which might be helpful: Creating an Annulus Sector with MapBasic
Now you can draw a line between the sectors found in 1. and the point. With a Select you can find all the polylines that are crossed by the line from the point to the sector. Remember to also include the ID of the sector in the query otherwise you might have lines to one sector crossing bearing polylines of other sectors.