LCHL: Revision of JC Trigonometry with extension to LC HL (radian measure)

Finding angles with sine ratio

Finding sides with the sine ratio

Finding angles with the cosine ratio

Finding sides with the cosine ratio

Finding angles with the tangent ratio

Finding sides with the tangent ratio

Khan

Trigonometry 2

• 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

Applying right triangles

• 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

Radical equations

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

Degrees to radians

• The area of sectors and arc length using degrees and radians

Alison.com Using radians to find area of sector

Khan

Radians and arc length

Circles and arcs

Areas of circles and sectors

Other Sites

IXL - Fifth year maths practice

Mathsisfun.com Trigonometry