# Trigonometry: Sine, Cosine and Area Rules [Foundation]

The purpose of this course is to teach learners the skills they need to be able solve for unknown sides and angles in all triangles. We begin by recapping the tools learnt in Grades 9 and 10 and then progress on to the Area Rule, Sine Rule and Cos Rule to help solve for these unknowns. We finish the course by applying these tools in mixed questions involving triangles, where learners need to think about which tool would be best to use.

• Lesson 1 60 minutes with Peter on Monday, 18 Jul 2022, 17:00

## Revising Triangle Tools

We revise the tools we learnt in Grades 9 and 10 and use them to solve for unknown sides and angles in triangles.

• Lesson 2 60 minutes with Peter on Wednesday, 20 Jul 2022, 17:00

## Using the Area Rule for Triangles

We use the Area Rule to find the areas of a variety of triangles.

• Lesson 3 60 minutes with Peter on Monday, 25 Jul 2022, 17:00

## Using the Sine Rule to Find Sides

We use the Sine Rule to find the unknown sides of a triangle.

• Lesson 4 60 minutes with Peter on Wednesday, 27 Jul 2022, 17:00

## Using the Sine Rule to Find Angles

We use the Sine Rule to find the unknown angles of a triangle.

• Lesson 5 60 minutes with Peter on Monday, 1 Aug 2022, 17:00

## Using the Cos Rule to Find Sides

We use the Cos Rule to find the unknown sides of a triangle.

• Lesson 6 60 minutes with Peter on Wednesday, 3 Aug 2022, 17:00

## Using the Cos Rule to Find Angles

We use the Cos Rule to find the unknown angles of a triangle.

• Lesson 7 60 minutes with Peter on Monday, 8 Aug 2022, 17:00

## Solving Triangles Using All Three Rules

We use all three rules – Area Rule, Sine Rule and Cos Rule – to solve for unknowns in triangles.

• Lesson 8 60 minutes with Peter on Wednesday, 10 Aug 2022, 17:00

## Mixed Questions on Solving Triangles

We look at a variety of questions where we need to use the Area Rule, Sine Rule and/or Cos Rule to solve problems.