Your device is currently offline. You can view downloaded files in My Downloads.

Lesson Plan

Find values of sine, cosine, and tangent by using the unit circle

  • Created by:
  • Standards:
  • Tags:
teaches Common Core State Standards CCSS.Math.Content.HSF-TF.A.2 http://corestandards.org/Math/Content/HSF/TF/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

You have saved this lesson!

Here's where you can access your saved items.

Dismiss
Content placeholder

Card of

  1. Begin lesson Begin assignment

Tip: swipe on touch devices, use your keyboard's ← and → arrow keys, or clicker buttons to quickly navigate the lesson plan

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Big Ideas: The unit circle has a radius of 1, so sin (t) =y/1=y and cos(t) =x/1=x and any point on the unit circle (x, y) can be labeled (cos(t),sin(t)). Therefore, cos(t) and sin(t) can be evaluated using the reference triangles derived from Pythagorean Theorem. After an investigation to review the standard 30-60-90 and 45-45-90 triangles that were used in geometry, students can apply similar triangles to the unit circle to create a table of "Special Angles." These Special Angles will help students to make meaning of the functions sine, cosine, and tangent. Vocabulary: Special Angles
Provide feedback