# MA301 : Trigonometric Functions

Review : Trig Functions. The intent of this section is to remind you of some of the more important (from a Calculus standpoint…) topics from a trig class.

One of the most important (but not the first) of these topics will be how to use the unit circle. We will actually leave the most important topic to the next section. Review : Solving Trig Equations. Example 3 Solve on Solution This problem is very similar to the other problems in this section with a very important difference.

We’ll start this problem in exactly the same way. We first need to find all possible solutions. So, we are looking for angles that will give out of the sine function. Now, there are no angles in the first quadrant for which sine has a value of. . . , so the angle in the third quadrant will be below the negative x-axis or . Below the positive x-axis or . Now we come to the very important difference between this problem and the previous problems in this section. This is not the set of solutions because we are NOT looking for values of x for which , but instead we are looking for values of x for which . . Well, actually, that’s not quite the solution. Notice that we also divided the by 5 as well! I’ll leave it to you to verify my work showing they are solutions.

By 5 you would have missed these solutions! N = 0. n = 1. n = 2. n = 3. n = 4. n = 5. n = 1 . Radians to degrees. How to convert degrees to radians or radians to degrees.

Theory: What are 'radians' ? One radian is the angle of an arc created by wrapping the radius of a circle around its circumference. Graphs of Sine, Cosine and Tangent. Here are some nice graphs to look at ...