Hello I want to kill t-rex but I cannot able to kill it.............how..

I found a glitch where Lara can go beside one of the poiny arches - it's on the far side, where there are 2 of the arches... Go to the right of the one on the right. If you jump up on a large boulder, and then come back down, you an shoot T-Rex, but nithing he does can toucj Lara. That's how I killed the beast.

Now, if only I could beat those $#@*! Centaurs!!!

Some terminology:
Trex rage meter full = RageFull. The trex will begin to charge you when it reaches RageFull.

Slo mo headshot mode = Headshot. On the PC version you would use the E key. Not sure about consoles.

The idea is to get the trex to RageFull, then as it charges, shoot it in an eye so that it crashes into the spiked logs at an end of the arena.

Practice each step separately, if necessary.
1. Shoot with pistols to get rage meter near full.
2. Run from one end of the arena to the other, dodge as necessary, to line yourself up with a spiked log behind you, with the trex ahead of you at least the size of a clementine or jar cap/can of soda, on screen. This will give you time to "headshot" it in the eyes.
3. With the trex in RageFull, repeatedly shoot while pressing Headshot to get into slo-mo mode. Press and hold Headshot when the game gives you eye targetting when trex gets close enough during it's charge -- you must keep the Headshot button held and active so that Lara locks on the eye. Only one shot is needed in this mode, but you may need to dodge the blinded trex to avoid damage.

I gave up with the whole dodge and head shot technique. I found a boulder just to the right of the one single spikey log structure. It has a plant on top. I run around and jump up on the boulder. TRex follows me but stops and just looks at me. I stand still on the boulder and continue to fire for 12 minutes, keeping his rage meter down. Eventually he dies and I get past it.