A samyaksambuddha teaches the dharma to others after his buddha and his teachings pdf. Nirvana through his own efforts, but does not teach the dharma to others. Buddha to attain Nirvana, but can also preach the dharma after attaining Nirvana.
In this broader sense it is equivalent to the arhat. Buddhism consider Buddhahood to be a universal and innate property of absolute wisdom. This wisdom is revealed in a person’s current lifetime through Buddhist practice, without any specific relinquishment of pleasures or “earthly desires”. Buddhists do not consider Gautama to have been the only Buddha.
However, the early texts contain explicit repudiations of making this claim of the Buddha. Tathagata—the supreme man, the superlative man, attainer of the superlative attainment. In the centuries after his final Nibbāna it sometimes got to the stage that the legends and myths obscured the very real human being behind them and the Buddha came to be looked upon as a god. Such complete persons are born no different from others and indeed they physically remain quite ordinary.
The first thing we have to understand – and this is very important – is that the Buddha is a human being. But a special kind of human being, in fact the highest kind, so far as we know. Buddha was not a god. He was a human being like you and me, and he suffered just as we do. Jack Maguire writes that Buddha is inspirational based on his humanness.