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Second derivative of a cosine product (Posted on 2024-02-27) Difficulty: 4 of 5
For natural number n, define f_n(x) as the product cos(x) * cos(2x) * cos(3x) * .... * cos(nx).

What is the smallest n such that |f_n''(0)| > 2024?

No Solution Yet Submitted by Brian Smith    
Rating: 5.0000 (2 votes)

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  Subject Author Date
SolutionAnalytic solutionJer2024-02-28 13:50:38
Analytic requestBrian Smith2024-02-28 10:58:17
Some ThoughtsPuzzle ThoughtsK Sengupta2024-02-27 14:02:08
SolutionThree methodsLarry2024-02-27 13:07:21
Solutioncomputer solution (spoiler)Charlie2024-02-27 12:18:43
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