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Homework Help: Finding absolute max/min

  1. Nov 7, 2008 #1
    1. The problem statement, all variables and given/known data

    Find the absolute max and absolute min values of function on the given interval:
    f(t) = 2cos(t) + sin(2t), [0,pi/2]

    2. Relevant equations

    3. The attempt at a solution

    f '(t) = 0
    0 = -2sin(t) + 2cos(2t)
    2sin(t) = 2cos(2t)
  2. jcsd
  3. Nov 7, 2008 #2
    Use a double angle formula to change the cosine term into a sine term. Then you'll have solvable equation.
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