Trigonometry

Unit Circle

Where sin and cos come from

  • High school
  • about 4 min
  • 1 of 11 in the family
Not started
(0.71, 0.71)cos = 0.707sin = 0.70745°
sin⁡(45°)=0.7071,cos⁡(45°)=0.7071\sin(45°) = 0.7071,\quad \cos(45°) = 0.7071

Point on a circle with radius 1. Cosine = x-coordinate, sine = y-coordinate.

Where it is taught