1. ©G Dear2008 – Not to be sold/Free to use
General Mathematic
(HSC)
Further
Trigonometry
Introduction
Stage 6 - Year 12
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©G Dear2008 – Not to be sold/Free to use

2. 3.1 Calculating Trig Ratios (1/11)
You can use your calculator to find trigonometric ratios.
When finding the angle we need to show working
Example:
Sin θ = 0.649
θ = Sin-1(0.649)
Use
DMS or o ’ ’’
= o
Minutes
= 40o 27’ 58’’
Seconds
Degrees

3. 3.1 The Trigonometric Ratios (2/11)α
Adjacent
Opposite
Hypotenuse

4. 3.1 The Trigonometric Ratios (3/11)β
Adjacent
Opposite
Hypotenuse

5. 3.1 The Trigonometric Ratios (4/11)ld
Sin θ = H
ags h o C an a h
Cos θ = A
lways θ a H
ide o a T
heir
Tan θ = ld A ge