- #1
phrygian
- 80
- 0
Homework Statement
Find the real part, the imaginary part, and the absolute value of:
cosh(2-3i)
Homework Equations
The Attempt at a Solution
I know how to write this using exponentials, but when I looked up the answer the book expanded cosh(2-3i) to cosh 2 cos 3 − i sinh 2 sin 3 , how in the world do you get there??
Thanks for the help