Education Technology

Precalculus: Trigonometric Patterns

by Texas Instruments

Updated on April 17, 2024


  • Students will use the unit circle and the handheld to estimate the six trig functions at certain angle measures.
  • Students will then find patterns in the results of the six trig function estimations and discuss them with their classmates.
  • Students will try to make a connection with how to understand these topics in IB Mathematics courses and on their final assessments.


  • Unit Circle
  • Right Triangle Trigonometry
  • Radian Measure

About the Lesson

Students are given the definitions of sine, cosine, and tangent and how they relate to the unit circle. Then, students are asked to use the unit circle to find the values of the functions at various angle measures to find patterns for each function.