Confused by trigonometry? What if I told you that modern math is not too accurate, anyway...and the ancient world had a better way? Read more about it, here:
www.theregister.co.uk/2017/08/25/plimpton_322_babylonian_trig_table/
www.theregister.co.uk/2017/08/25/plimpton_322_babylonian_trig_table/