Trigonometric identities

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Posted by Janos Koplyay on October 12, 1998 at 17:23:42:

Is there a method to find an identity formula forcos(5x), or cos(nx) where n is greater than 2?
I am thinking of something like the identity for cos(2x)
Thanks!

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Re: Trigonometric identities Louis Feng 23:57:34 10/20/98 (0)

Re: Trigonometric identities Louis Feng 23:50:07 10/20/98 (0)

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Comments: : Is there a method to find an identity formula forcos(5x), or cos(nx) where n is greater than 2? : I am thinking of something like the identity for cos(2x) : Thanks!

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