SubArea: Trigonometric equations and inequalitiesLevel: AProject ID: 9000086703Accepted: 1Clonable: 0Easy: 1Identify the optimal substitution which simplifies the following equation as much as possible. 5cotg(30∘−4y)=030∘−4y=tcotg(30∘−4y)=tcotg(30∘−4y)=04y=0
