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Algebra II

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Find the exact value of cos 375 degrees.

Answer: (sqrt6 + sqrt2)/4

Is this correct?

  • Algebra II -

    15 deg
    sin (30/2)= sqrt [(1-cos 30)/2 ]
    cos 30 = sqrt 3 /2
    sqrt [ (1- sqrt 3/2)/2]
    sqrt [ (2 - sqrt (3) ) /4 ]
    = (1/2) sqrt (2 - sqrt 3)

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