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Trig: Finding Sides

Triangles home | Pythagoras A | Calculator Practice | Trig Finding Sides | Trig Finding Angles | Trig Applications | Vectors | Bearings | 1.7 Revision

Use the links above to other pages and the links below to navigate down the page
Overview | Using Sin | Using CosUsing Tan | Putting it together

Overview

Trigonometry links two sides and one angle of a right angle triangle

This involves the SIN COS & TAN calculator functions

Label triangle
How?

Sin the angle

Cos the angle

Tan the angle

Mouse-over key words

This gives the ratio of the sides
eg. Sin (angle) = ratio of 'opposite' 'hypotenuse'

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Using Sin
SOH CAH TOA

Finding opposite side

Using Sin

Working

Answer

Finding hypotenuse

Using Sin

Working

Answer

Mouse-over key words

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Using Cos
SOH CAH TOA

Finding adjacent side

Using Cos

Working

Answer

Finding hypotenuse

Using Cos

Working

Answer

Mouse-over key words

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Using Tan
SOH CAH TOA

Finding opposite side

Using Tan

Working

Answer

Finding adjacent side

Using Tan

Working

Answer

Mouse-over key words

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Put it Together

1) Label triangle

2) Cross off the irrelevant side

3) Select trig rule

4) Substitute in known values

5) Cover unknown & solve

6) Working rounding units

Mouse-over key words

 

Trigonometry

1) Label triangle
2) cross off irrelevant
3) Select Trig rule
4) Substitute in
5) Cover unknown & solve
6) Working

 

continue to finding angles

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