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Mathematics 21 Online
OpenStudy (anonymous):

which of the following is equal to cos^2(6x)

OpenStudy (anonymous):

I am unsure how to manipulate it. the answer options are: a. sin^2 (3x) /4 b. 1 + cos12x /2 c. 1-cos12x /2 d. 1-2cos6x /4 e. none of the above

OpenStudy (anonymous):

@satellite73 can you help?

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