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MathNet 2021 — Part 01 Question 42

Math Olympiad Vault · MathNet 2021 — Part 01

Question 42

Let $x$ be the least real number greater than $1$ such that $\sin x = \sin(x^2)$, where the arguments are in degrees. What is $x$ rounded up to the closest integer?
  1. 10
  2. 13
  3. 14
  4. 19
  5. 20