Hi all,
I have a question asking to solve this equation (rounded to 2 d.p.) in the domain -pi <(or equal to) theta <(or equal to) pi.
I do know how to use the identity tan(theta) = sin(theta)/cos(theta), which leads to cos(theta) = 1/3, so theta = -1.23 or 1.23.
However, my book suggests three other answers as well, which are -pi, 0 and pi. Could anyone explain to me why those answers as well? In any equation of this type, what do I have to remember to cover all possibilities?
Many thanks