Teaching and Learning Plans:
Plan 8: Introduction to Trigonometry
Interactive T&L: Introduction to Trigonometry
Exploring the Distance Formula. (Zip File)
Radian Measure
Introducing Radians (Zip File)
• The use of Pythagoras’ Theorem in right-angled triangles
Khan
Pythagorean theorem word problems
• Trigonometric ratios in a right-angled triangle
Khan
Video Basic trigonometry
Video Secant (sec), cosecant (csc) and cotangent (cot) example
• The use of the ratios to solve problems involving right angled triangles
Alison.com
Finding sides with the tangent ratio
Khan
• The use of similar triangles to find unknowns in right-angled triangles
Khan
Video Similarity to define sine, cosine, and tangent
Trigonometric functions and side ratios in right triangles
• The use of the clinometer
Video How To Use/Make A Clinometer - YouTube
Khan
• How to work with trigonometric ratios in surd form and solve problems involving surds
Khan
Video How to rationalize a denominator
Adding and subtracting radicals
Extraneous solutions to radical equations
• How to manipulate measure of angles in both decimal and DMS forms
How To Convert Decimal Degrees into Degrees, Minutes, Seconds
Online Conversion - Decimal Degrees
• The use of radians as a unit of measurement of angles
Alison.com Introducing Radians
Khan
• The area of sectors and arc length using degrees and radians
Alison.com Using radians to find area of sector
Khan
Other Sites
IXL - Fifth year maths practice
Mathsisfun.com Trigonometry