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    Trigonometry : Sum and Difference Identities

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    Use the sum and difference identities to find the exact value of cos(75) exactly

    Which of these is the correct answer?

    A. 2 (1- 3)/2
    B. 2 (3-1)/2
    C. 2 (1- 3)/4
    D. 2 (3-1)/4

    [show the steps in completing this problem]

    © BrainMass Inc. brainmass.com December 24, 2021, 7:01 pm ad1c9bdddf
    https://brainmass.com/math/trigonometry/trigonometry-sum-difference-identities-156805

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    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com December 24, 2021, 7:01 pm ad1c9bdddf>
    https://brainmass.com/math/trigonometry/trigonometry-sum-difference-identities-156805

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