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Zeta sine (Posted on 2018-10-28) Difficulty: 4 of 5
What is the maximum value of the expression below?

sin x / 13 + sin 2x / 23 + sin 3x / 33 + ...

No Solution Yet Submitted by Danish Ahmed Khan    
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re(2): Solution (spoiler) | Comment 5 of 6 |
(In reply to re: Solution (spoiler) by Charlie)

I just realized, JayDeeKay's original had such a small value. I was thinking 1.1202 even while seeing and typing .1202. In some cases, obviously x^3 would be 1 when x is 1; so I don't understand what was being considered by JayDeeKay.

Edited on October 31, 2018, 2:09 pm
  Posted by Charlie on 2018-10-31 14:07:46

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