Let be a point inside such that

MATHEMATICS · Subjective · A Level · Mathematics · Trigonometry · Trigonometry

Problem

Let OO be a point inside △ABC\triangle ABC such that ∠OAB=∠OBC=∠OCA=ω\angle OAB=\angle OBC=\angle OCA=\omega. Show that cot⁡ω=cot⁡A+cot⁡B+cot⁡C.\cot\omega=\cot A+\cot B+\cot C.

Related theory

Browse the problem library