How does sociology and anthropology related to history?

History is a recording of the past and past events altogether.

Anthropology focuses specifically the human race's origins and ancestry, but also works to foretell what will come of it in the future.

In meantime, sociology is the study of how humans influence one another.

Therefore, the two Social Sciences work hand in hand to help further expand on our present knowledge of history, which is many times considered a social science as well. Hence, social studies.