De Moivre's Theorem is super helpful when working with complex numbers! Here’s how it makes things easier:

• Power Calculations: If you want to raise a complex number to a power, instead of doing a lot of complicated math, you can use this theorem. For example, if you have a complex number written as $z = r(\cos \theta + i \sin \theta)$, you can easily find $z^n = r^n(\cos(n\theta) + i \sin(n\theta))$.

• Finding Roots: It also helps us easily find the roots of complex numbers. For instance, to find the $n$th roots, you can use $z^{1/n} = r^{1/n}(\cos(\frac{\theta + 2k\pi}{n}) + i \sin(\frac{\theta + 2k\pi}{n}))$ where $k$ is from 0 to $n-1$.

Overall, De Moivre's Theorem is a handy tool that makes working with complex calculations much simpler!