Circular Functions

In this video, we explore how to solve for sine using the unit circle when the value is negative one. By thinking about the height or Y value corresponding to a negative one, we can determine the angle on the unit circle that gives us this value. In this case, the answer is theta equals 270 degrees. Join us to learn more about using the unit circle in trigonometry! #trigonometry #unitcircle #sine #mathematics

[OgbikePatrick]

The answer should be -90° since the sin inverse of -1 is -90.

[Bernerker]

sin = -1 is not only for 270 degrees
its for 270 degrees + k360
(k element of integers)