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    Trigonometric Identities : Calculate cos(3u) in terms of cos(u).

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    Calculate cos(3u) in terms of cos(u).

    © BrainMass Inc. brainmass.com September 26, 2022, 9:48 pm ad1c9bdddf

    Solution Preview


    cos(2u+u) =

    cos(2u)cos(u)-sin(2u)sin(u) ...

    Solution Summary

    Cos(3u) is calculated in terms of cos(u).