# How do you evaluate arctan 2 + arctan 3?

63^@435 + &1^@565 = 135^@
tan x = 2 --> arc $x = {63}^{\circ} 435$
tan x = 3 --> arc $x = {71}^{\circ} 565$
$\arctan 2 + \arctan 3 = {135}^{\circ}$