Cosine Rule – Finding Angles

Cosine Rule – Finding Angles
Cosine Rule – Finding Angles
Cosine Rule – Finding Angles
Cosine Rule – Finding Angles

              Cosine Rule – Finding Angles

              Students learn how to derive and apply the Cosine Rule to find missing angles in triangles.  As learning progresses students begin to calculate a combination of angles in adjoining triangles.
              Differentiated Learning Objectives
              • All students should be able to calculate an unknown angle in a triangle using the Cosine rule.
              • Most students should be able to calculate an unknown angle or a bearing using the Cosine rule.
              • Some students should be able to derive and apply the Cosine rule for triangular shapes.
              View online lessonLesson DownloadsDownload PowerPoint Download Notebook Download Flipchart Download Worksheet
              Scheme of Work Link
              Trigonometry - Non-Right-Angled Triangles
              Related Blog
              Solving Problems with Non-Right-Angled Triangles 
              IMMEDIATE DOWNLOAD

              You may also like...

              Pythagoras’ Theorem – Finding the Hypotenuse

              Students learn how to derive and apply Pythagoras' Theorem to find the hypotenuse of right-angled triangles.  A...

              Exact Trigonometric Solutions

              Students learn how to solve trigonometrical equations with exact solutions using special triangles.   As learnin...

              Cosine Rule – Finding Lengths

              Students learn how to derive and apply the Cosine rule to find missing lengths in triangles.  As learning progre...

              Mr Mathematics Blog

              Problem Solving – Numerical Methods

              Students are challenged to apply the rules of arithmetic to a series of real-life, functional problems.

              Problem Solving with Averages

              Students are challenged to apply their understanding of the mean, mode, median and range to calculate datasets by setting up and solving equations.

              Problem Solving with Compound Percentages

              Five, real-life and functional problem solving questions on compound percentage changes.