Trig Review for Physics - Common Math Tools - Physics 101, AP Physics 1 Review with Physics Girl

If you dog is pulling horizontally with 17 newtons and vertically with 10 newtons, then it makes me wonder where the extra 7 newtons went since the total force is 20 newtons.  The trig doesn't lie but when you said, "the downward force is even easier," I had expected you would say energy and thereby force is conserved so if the total force is 20 and we've determined that the horizontal component of that force is 17, then the downward force is obviously 3.