Solution Videos Step-by-step Solution Problem to solve: $\csc\left(120\right)-\cot\left(240\right)=\tan\left(390\right)$ Specify the solving method Choose an optionProve from LHS (left-hand side)Prove from RHS (right-hand side)Express everything into Sine and CosineSuggest a method or feature Send Final Answer Sorry, we couldn't solve this problem right now. Please check back later or try another solving method.