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26 December, 19:05

Trig: Use a half angle formula to find the exact value of the expression?

cos (5pi/12)

+1
Answers (1)
  1. 26 December, 21:56
    0
    I believe that the correct answer would be 0.999739299

    5 * 3.14 = 15.7

    15.7/12 = 1.308333333

    cos (1.308333333)

    0.999739299
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