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Sin Rule

Triangles HOME | Achievement Criteria | Pythagoras | Trigonometry | Area | Sin Rule | Cosine Rule | Revision

5

Sine Rule Finding a Side

Using the sine rule a/SinA = b/SinB to calculate sides of non-right angle triangles

 

Khan Academy Videos: Pythagoras Iintroduction & Example

Properties of triangles | MR notes, Blank notes

p424 Ex 30.01
p425 Ex 30.02

You Tube: Imagine there is no sine rule - this is a shocker

p135

Sine rule to find a Side ( java)

6


Sine Rule finding an Angle

Using the sine rule SinA/a = SinB/b to calculate an angle in a non-right angle triangles

   

MR notes, Blank notes

p427 Ex 30.03
p427 Ex 30.04

p136

Sine rule to find an Angle (java)

7

Sine rule Applications

Using the Sine Rule to solve application problems and the ambiguous case

MR notes, Blank notes

p428 Ex 30.05
p431 Ex 30.06

p137 applications
p138 the ambiguous case

Overview

The Sin rule links TWO SIDES and TWO ANGLES in a triangle

Rule

Find Angles

Find Sides

Mouse over key words

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Find a Side

To find a side length in a triangle, given two angles and another side length.

Sine rule to find a Side ( java)

Rule

Find Side

Mouse over key words

You tube Aussie video on the Sine rule

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Find an Angle

To find an angle in a triangle, given two sides and another angle.

Sine rule to find an Angle (java)

Rule

Find Angle

Mouse over key words

Remember to inverse, eg sin-1

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Application

The sine rule can be applied, sometimes another angle must be found first.

Rule

Find Angle

Solve problem

Mouse over key words

Continue to Cosine Rule

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