Connecting laptop to tv with vga AND rca

Hello there,
So here's the deal. I'm trying to watch movies on my tv via netflix off of my laptop. I bought a vga cable and hooked that up and the picture is perfect. I also have that cord (i think it's an rca cable) that hooks into my headphone outlet on my laptop and then splits into red and white outlets. Firts, i don't know where to hook the red and white ones into my tv. The tv is pretty new. It's HD capable, we just don't use it. Anyways, any help would be great! Thanks!