I did this = 2.(e^theta -e^-theta)/2 x(e^theta -e^-theta)/2
=2 x 1/4(e^2theta + e^-2 theta)
=(e^2theta +e^-2theta)/2
= cosh2
I am trying to get the hang of this Latex
I did this = 2.(e^theta -e^-theta)/2 x(e^theta -e^-theta)/2 (1)
=2 x 1/4(e^2theta + e^-2 theta) (2)
=(e^2theta +e^-2theta)/2
= cosh2
I am trying to get the hang of this Latex
Unfortunately, that's not the identity (and besides step (1) to (2) is wrong - there's a cross term missing). The identity is