Question

How do you evaluate `arctan(sqrt3)` without a calculator?

Answer 1

arc `x = pi/3` and arc `x = (4pi)/3`

Explanation:

Use trig table of special arcs and unit circle -->
`tan x = sqrt3` --> 2 solutions -->
arc `x = pi/3` and arc `x = pi/3 + pi = (4pi)/3`