- Alameda Post - https://alamedapost.com -

Math Puzzle for January 16, 2026

A red rope is coerced into forming a sine wave

Alameda Post - A diagram of a sine wave. [1]

Tristan has an inelastic red rope measuring exactly 12 units in length. On a smooth flat surface, he carefully forms the rope into a perfect sine curve.

Find the amplitude a of the sine wave he formed.

Send your correct answer to [email protected] [2] for a chance to win a Tucker’s gift card.

Last week’s winner [3] was Ben Chacon with 32130 square units.

(Author’s Note: We ask that readers do not use AI to solve this puzzle.)

Jeff Smith is a former Math teacher and a retired US Navy Lieutenant Commander. Reach him at [email protected] [2].