This term of Math Essential, our class was focusing preparing for the SAT test on the 6th of October; therefore students were independently working on different areas that they are struggling with. One of the main topics that I learned was Unit Circle.
Unit Circle is a circle with the radius of 1 with the origin of (0,0), which is used to calculate and understand the relationship sines and cosines of special triangles such as 30/60/90 and 45/45/90.
For Unit Circle the measurement of angle is in radians instead of degree, there are 2π radians, which is equivalent to 360 degrees.
United Circle with 30/60/90 triangle
Unit Circle with 45/45/90 triangle
