Find an exact value. - 4581221. adrianbarone adrianbarone 08/06/2017 Mathematics High School answered Find an exact value. cosine of negative seven pi divided

Split π 12 π 12 into two angles where the values of the six trigonometric functions are known. Apply the difference of angles identity cos(x−y) = cos(x)cos(y)+sin(x)sin(y) cos ( x - y) = cos ( x)

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