Kṛṣṇa defines the two terms clearly. ‘Sannyāsa’ is the giving up of specific activities that are based on selfish desires (Kāmyā-karma). ‘Tyāga’ is the broader principle of giving up the results of all activities. The distinction is between giving up the ‘act’ versus giving up the ‘ego’ behind the act. Learned men might argue about which is better, but Kṛṣṇa is leading Arjuna toward ‘Tyāga’. For a person living in the world, it is almost impossible to stop all actions. However, it is possible to stop being attached to the rewards. This is the ‘Yoga’ of work where the body acts, but the mind remains unattached. This definition saves us from a ‘fake’ renunciation where a person leaves their home but still dreams of money. Real renunciation is internal. It is the ‘Nyāsa’ or placing of our desires at the feet of the Lord. Whether we are at a desk or in a temple, if we give up the fruit, we are truly renounced.