In trig this year we learned what reference angles are. They are determined by the angle that’s closest to the x-axis, this will help decide whether or not you add or subtract from the degree of each quadrant. The rotational angle is determined from 0 to where the arm is
We also learned 2 new formulas, the sine law and the cosine law. These are used to solve non-right angle triangles because Pythagoras can not be used properly. The sine law can only by used when there’s at least one whole fraction in the triangle, while the cosine law is used hweb there is not a full fraction.
There are also special triangles that have a certain pattern to them.