Question

how do I solve this?

Answer 1

Find one solution first

Answer 2

What is a solution of \(\tan x=\frac13\)?

Answer 3

0.32?

Answer 4

Yep

Answer 5

x=0.321750563337±πn,3.463340563337±πn so the second choise

Answer 6

Note the formulae:
\(\sin x=\sin(\pi-x)\)
\(\cos x=\cos(-x)\)
\(\tan x=\tan(\pi+x)\)

Answer 7

hm, what is the next step? I just took the arctan(1/3)

Answer 8

oh, I think I get it, thanks!