How to mirror camera screen on a tv?

I don't want to record video with my nikon d90 rather I want to hook it up to a tv and have my television mirror what my camera sees live. Is this possible with my camera model?

Nope, cameras don't work that way… At least not consumer models. For that you'll need a professional video camera that can feed a monitor.

You don't want to record video with your D90. Good! Get a digital camcorder, attach video out to the TV and view what you shoot directly on TV. (Err… Does it really work that way? Ask the salesman.)

With your dSLR, I'm sure it's not possible. You can do tethering with a computer but not with a TV even if it's LCD and with internet.