Trigonometry and measure of angles

Right-angled triangles

• Finding the side length of a right angle triangle - part 1

• Finding the side length of a right angle triangle - part 2

• Finding an angle in a right-angled triangle

• Angles of elevation and depression

• Compass and true bearing (revision)

• Trigonometry involving bearing

• Application of trigonometry - part 1

• Application of trigonometry - part 2

Non-right-angled triangles

• Finding an unknown angle - part 1

• Finding an unknown angle - part 2

• Finding an unknown side 

• The cosine rule

• Application of cosine rule - part 1

• Application of cosine rule - part 2

• Area of a non-right-angled triangle

• 3-dimensional trigonometry - part 1

• 3-dimensional trigonometry - part 2