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Rhind Mathematical Papyrus

This is a detailing of a portion of the Rhind Mathematical Papyrus, an Ancient Egyptian scroll now housed in the British Museum. This scroll features mathematical problems, including the calculating of the slope of a pyramid, called a Seked. Dated to around 1550 BCE, it is one of the first surviving pieces of evidence for trigonometry.

https://commons.wikimedia.org/wiki/File:Rhind_Mathematical_Papyrus.jpg

1550 BCE