When you encounter a wild Carnotaurus in or near a forest, walk towards him, so that he is between you and the trees. He will go away from you to attack you with his charge run attack. By doing so he has a high chance of getting stuck between the trees. Now you can knock him out savely. But remember to chop down the trees when he is knocked out, because when he is tamed he will start running and bugging when the trees are still there.
how to tame annoying ahh carnos that kill most dino’s and you:
1. get bow (level 10) and tranq arrows (level 21)
2. make a trap for it (u can easily find on yt)
3. find carno and shoot tranq arrows while u run to ur trap and trap it
4. shoot tranq arrows until it is unconscious.
5. feed it meat (raw meat, raw mutton, prime meat,etc)
6. boom, u got a carno.
tranq arrows are unlocked at level 21 but need narcotics (level 6) which are craftable at a Mortar and Pestle with Nacroberries (black ones) and Spoiled meat (keep any meat in ur inventory for along time to make it spoil).