Chapter 4.2, Problem 38P

(a)

To determine

The Wronskian of a fundamental set of solutions of the given equation of the differential equation $y^{\left(4\right)}-y=0$.

(b)

To determine

The Wronskian of the solutions of $e^t,e^{-t},\cos t$ and $\sin t$.

(c)

To determine

The Wronskian of the solutions of $\cosh t,\sinh t,\cos t$, and $\sin t$.