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Polynomial and trigonometry

  1. Mar 25, 2012 #1
    1. The problem statement, all variables and given/known data
    If x3 + 5x2 + 4x = 3 = 0 and cos (5 - 3x) = √p, find the value of cot (x5 + 2x4 - 6x3 + 16x2 + 8x + 20)

    2. Relevant equations
    trigonometry
    polynomial


    3. The attempt at a solution
    stuck from the beginning....:tongue:
     
  2. jcsd
  3. Mar 25, 2012 #2

    rock.freak667

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    Homework Helper

    Try modifying x5 + 2x4 - 6x3 + 16x2 + 8x + 20 such that you can pull out (by adding or subtracting) x3 + 5x2 + 4x + 3 (which you know to be equal to zero).
     
  4. Mar 25, 2012 #3
    OK. thanks for the help
     
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