elwoodleH3aestina elwoodleH3aestina

23-11-2016
Mathematics

contestada

How do you write cos(6x) in terms of cosx and sinx?

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pkmnmushy pkmnmushy

28-11-2016

If you see this as cos[2(3x)]
Then what we can do is letting a = 3x to make it easier
Then it will be cos2a
Hope this helps a lot

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