What is cbrt -1?

The cube root of -1, denoted as ∛-1, is an irrational number that can be expressed in both rectangular and polar form. In rectangular form, it is represented as (-1)^(1/3) = -0.5 + 0.866i, where i is the imaginary unit. In polar form, it can be expressed as ∛1 × cis(2π/3 + 2kπ), where k is an integer. The cube root of -1 is important in mathematics, particularly in complex analysis and trigonometry, as it represents the principal value of the third root of unity.