What is the determinant of the matrix A=(cosh(θ)sinh(θ)sinh(θ)cosh(θ))A = \begin{pmatrix} \cosh(\theta) & \sinh(\theta) \\ \sinh(\theta) & \cosh(\theta) \end{pmatrix}A=(cosh(θ)sinh(θ)sinh(θ)cosh(θ))?
111
cosh(2θ)\cosh(2\theta)cosh(2θ)
−1-1−1
000