Find value of f(z) = sin^2(z) at z=i

Question

Find the value of the function $f(z) = sin^2(z)$ at $z_0 = i$. Express your answer in the form $a + ib$.

Answer 1

$$\sin^2(i) = i\sinh(1)\cdot i\sinh(1) = -\sinh^2(1)$$ Which is entirely real