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derive multiple argument properties for the given functions

1.sin3x in terms of sin x alone

2. cos 4x in terms of cos x alone

 Apr 24, 2021
 #1
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Hi Jenny,

Q1

Start with sin(3x)=sin(2x+x)

Do the expansion and just keep expanding what you get until it all falls out.

Give it a go and come back with what you have done.

 Apr 28, 2021

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