If you want to tame a rhino make sure the area is clear if it's not clear kill the direwolfs or other wild dinosaur and stay up hill so Rhino can't get you and use Shocking Tranquilizer Dart it takes to 3 shots and hes or she down.
Ez tame even for early game , just use 4 billboards, put around rhino when still unaggro and then when the rhino is trapped with the billaboards just start shooting tranqs . ( Can use wooden billaboards)
When KOing just run in circles filling it with tranq arrows or darts(high level) this is the way to cheese this Dino’s taming. Even someone that just got into a world with good movement speed could do it easy. And the Dino’s are super op when fully charged. This will help ALOT :)
On survival evolved all you need is tranq arrows a dino that you can shoot while riding it, and its preferred kibble or meoberries. Mainly I would do the kibble because meoberries take a long time to tame it and wastes alot of narcotics.
When tranqing. Place 5 or more large bear traps in a row between you and the rhino. Then stand behind the traps with the traps between you and the rhino and shot it. The rhino will charge and get stuck in the bear trap for 10 seconds, followed by the next and so forth.