1. The problem statement, all variables and given/known data 2. Relevant equations N/A 3. The attempt at a solution I am confused as to where the ω3sin(θ)k term disappeared to? It is not included in the very last line? I asked my lecturer and he said it's ''constant'' but he kind of shrugged off the question. I understand everything else; it's just the omission of this term in the final answer that has me confused.