If you have used GameMaker, you might know this as lengthdir_x,y. This isn't available in Construct, but really its just a simple formula. For that reason, this tutorial will contend with being one of the shortest out there.
I recommend making a function with the following ACE:
What this calculates is the relative X or Y coordinates based on only the knowledge of how far and at what angle the point is. Add the returning number to your objects X or Y value to get the proper coordinates of your target.