A:Answer You need to put 2D-3D conversion on if it's not already on (I have to do it every time on my projector), and if it's a passive TV get passive 3D Glasses but if it supports Active Shutter then get these. The way 3D works (on Active Shutter glasses, like these) is that each eye sees a slightly different image, making it look 3D, but also both sides close and open really fast, in sync with the TV/Projector, to create the illusion that you are seeing 3D. And you are not seeing 2 images at the same time, so these don't give much headaches.
(Also Passive 3D Glasses cost around $10 and you should get that because you have a Passive 3D TV)