Evaluate $\Re[\cos(1+i)]$ Evaluate $\Re[\cos(1+i)]$.
The trigonometric function in the expression is throwing me in a loop and need some guidance on how to evaluate this.
Thanks.

$$2\cos(a+ib)=e^{i(a+ib)}+e^{-i(a+ib)}=e^{-b}e^{ia}+e^be^{-ia}$$
Use Euler Identity: $e^{ix}=\cos x+i\sin x$
