Let A=(0−θθ0)A = \begin{pmatrix} 0 & -\theta \\ \theta & 0 \end{pmatrix}A=(0θ−θ0) be a 2×22 \times 22×2 skew-symmetric matrix. What are the eigenvalues of eAe^AeA?
eiθ,e−iθe^{i\theta}, e^{-i\theta}eiθ,e−iθ
eθ,e−θe^\theta, e^{-\theta}eθ,e−θ
cosθ±isinθ\cos\theta \pm i\sin\thetacosθ±isinθ
Both a and c