The teacher will be very surprised to see your correct solution 😉
//-223*pi\\ ||-------|| |\ 10 /| /x*pi\ tan|---------| = 2*tan|----| \ 360 / \360 /
Divide both parts of the equation by -2
/ /223*pi\\ |tan|------|| | \ 3600 /| -360*atan|-----------| \ 2 / x1 = ---------------------- pi
x1 = -360*atan(tan(223*pi/3600)/2)/pi
sum
/ /223*pi\\ |tan|------|| | \ 3600 /| -360*atan|-----------| \ 2 / ---------------------- pi
=
/ /223*pi\\ |tan|------|| | \ 3600 /| -360*atan|-----------| \ 2 / ---------------------- pi
product
/ /223*pi\\ |tan|------|| | \ 3600 /| -360*atan|-----------| \ 2 / ---------------------- pi
=
/ /223*pi\\ |tan|------|| | \ 3600 /| -360*atan|-----------| \ 2 / ---------------------- pi
-360*atan(tan(223*pi/3600)/2)/pi