Despite the fine triangle at the posted coordinates, you won't find the cache there. First you'll need to build 2 tetrahedra! A regular tetrahedron is a 4 sided solid where each face is an equilateral triangle. Just imagine a pyramid where the base is a triangle rather than a square.
Below are 8 pieces of our puzzle. You'll need to print the picture. Cut the pieces along the solid lines and fold along the dashed ones. With those pieces, build 2 regular tetrahedra, one with solid triangles and one with hollow ones. You'll need adhesive tape. From each tetrahedron, should be able to derive a set of 4 numbers. Let's call the numbers A, B, C, D (solid) and E, F, G, H (hollow) where A<B<C<D and E<F<G<H (from smallest to largest). If you have it right, the cache is hidden at N 47° 3D.BCA and W 122° 1E.GFH.
You can check your answers for this puzzle on Geochecker.com.