Learning Resources

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Outcomes

In this lesson you will

  • Determine the central angle when the coordinates of the point where the terminal arm of the angle intersects the circle.
  • Find the exact values of the sine and cosine of 30°, 45°, 60°.

By the end of this section you should be able to:

  • Demonstrate an understanding of the relationship between angle rotation and the coordinates of a rotating point.
  • Solve problems involving the equations and characteristics of circles and ellipses.

Prerequisites

To be successful in this lesson, it would be helpful to know the following:

  • How to plot points on the unit circle.
  • How to use a calculator to find the inverse for the cosine and sine.
  • The definition of related angles and how to find them.