Consider the problem
y' = (1 - y2)10 cos y, y(0) = 0.
Let J be the maximal interval of existence and K be the range of the solution of the above problem. Then which of the following statements are true?
1
J = ℝ
2
K = (-1, 1)
3
J = (-1, 1)
4
K = [-1, 1]