Education Technology

Precalculus: Relatives of the Sine Law
by Texas Instruments

Published on August 03, 2011


  • Students will make conjectures about the types of triangles for which certain variations of the Law of Sines are true.
  • Students will verify conjectures using algebraic and trigonometric methods.


  • Law of Sines
  • Law of Cosines

About the Lesson

This lesson involves investigating several variations of the Law of Sines.
As a result, students will:

  • Make conjectures about the type of triangles for which variations of the Law of Sines are true.
  • Verify conjectures using algebra, the Law of Sines, the Law of Cosines, and other trigonometric identities.