Lesson Plan

Simplifying Trigonometric Expressions

Pre-Calculus students use an Explorelearning Gizmo to practice simplifying trigonometric expressions.
Brent P.
Classroom teacher
Novi High School
Novi, United States
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My Grades 9, 10, 11, 12
My Subjects Math

Students will be able to...

  • Use trigonometric identities to simplify trigonometric expressions. 
  • Understand when a trigonometric expression is completely simplified. 

This is a basic skill necessary in order to prove and apply trigonometric identities as required by the Common Core Math Standards.

Grades 9 – 12
All Notes
Teacher Notes
Student Notes

1 Hook

Activity: Reading

Students use two column note taking to investigate the concept of Simplfiying Trigonometric Expressions with their textbook.  In the left column students write down key ideas from the text.  In the right column students write down connections they have made from other units and or questions they have.

2 Direct Instruction/Guided Practice

Activity: Presenting

Students are given a specific examples of how to simplify trigonometric expressions.  After each example students are given an opportunity to try another problem with a partner.  The teacher moves around the room identifying students who need additional support.

3 Independent Practice

ExploreLearning Gizmos
Free to Try, Paid

Students use the Simplifying Trigonometric Expressions Gizmo from Explorelearning to practice after recieving direct in class insturction on this topic.  Kids drag and drop possible solution steps and receive immediate feedback to help them figure out if an expression is completely simplified.  

4 Wrap-up/Assessment

ExploreLearning Gizmos
Free to Try, Paid

Once students are confident in their understanding they can move on to the assessment questions included in the Simplifying Trigonometric Expressions Gizmo.  Assessment results are reported out both to the teacher and the student.  Kids also get to see what questions they got wrong and why.  This makes this tool a great formative assessment.