Trigonometry and Force (2) - WORKED EXAMPLE - GCSE Physics

This video is a worked example on trigonometry. This is a popular question for students to be asked and this one is specific to using trigonometry to calculate the direction of a force.

The question is as follows:
An object experiences of 3.8N to the right and 8.2N downwards. Calculate the direction of the resultant force. 

Thanks for watching,

Lewis

This video is not specifically relevant but recommended for GCSE Physics 9-1 in the following exam boards:
AQA (including Trilogy)
Edexcel
CCEA
OCR A
OCR B
WJEC
CIE (Cambridge International Examinations) IGCSE
Edexcel International IGCSE

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[PhysicsOnline]

At 1:52 I said 'Decimal Mode', I should have said 'Degrees Mode'.

[adambowes]

What do you do if the forces are acting in opposite directions. How do you know which angle to work out ?

[LamarOchen]

How do you know when to use this over Pythagoras?