The inequality, Eq(cos(x**3), 0), cannot be solved using solve_univ​ariate_ine​quality.

Hi! I'm having issues on the following program:

syms x;
solve(cos(x^3), x>0);

It just keeps throwing this error:

The inequality, Eq(cos(x**3), 0), cannot be solved using

solve_univariate_inequality.

What's going on in my code? Thank you!