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26 August, 07:43

The value pi/24 is a solution for the equation 4 cos^4 (4x) - 3

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Answers (1)
  1. 26 August, 09:32
    0
    False

    Step-by-step explanation:

    4 cos^4 (4x) - 3 = 0

    Substitute into the equation

    4 cos^4 (4pi/24) - 3 = 0

    4 cos^4 (pi/6) - 3 = 0

    Take the cos pi/6

    4 (sqrt (3) / 2) ^4 - 3 = 0

    Take it to the 4th power

    4 (9/16) - 3 = 0

    9/4 - 3 = 0

    9/4 - 12/4 = 0

    -3/4 = 0

    False
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