Why did Mexican president Santa Anna give independent to Texas?

Mexican President Santa Anna granted independence to Texas primarily due to the defeat of his forces at the Battle of San Jacinto in April 1836, where Texan rebels led by Sam Houston captured him. Faced with military defeat and the loss of control over Texas, he signed the Treaties of Velasco, which recognized Texas' independence. Additionally, the political and military pressures from the Texan revolt and the growing desire for independence among Texans made it increasingly difficult for Santa Anna to maintain authority over the region.