The trigonometric functions can be described on an x-y coordinate plane (Euclidean plane) using a circle of radius 1 unit and cutting a sector that subtends an angle θ at the centre. Refer to the diagram below for details.

The Eye of Horus: Symbolism History and Meaning in Ancient Egypt
Explore the powerful symbolism of the Eye of Horus its history and its significance in ancient Egyptian culture. Learn about its use in amulets burials and more.
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