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

How do you write cos(6x) in terms of cosx and sinx?
asked 28.3k views
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How do you write cos(6x) in terms of cosx and sinx?

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User DaBears
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1 Answer

6 votes
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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User Lodhb
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