Here is a botw tutorial on how to defeat a Hinox. Press [SPACE] or click to go onto the next slide.
Credits to Nintendo and The Legend of Zelda: Breath of the Wild (obviously) In a shrine quest, The Three Brothers, you must defeat all Hinoxes. These Hinoxes are called Hinox (Youngest Kin), Hinox (Middle Kin) and Hinox (Oldest Kin). This quest is found on Mount Taran.