TR-19: Graphing Tangent and Cotangent (Trigonometry series by Dennis F. Davis)

Graphs of tangent and cotangent curves. Asymptotes are defined and placed where function's denominator = 0. Graphing methods and hints are provided. Series introduction including complete video list: TR-00: [https://youtu.be/U23JMdBIJ0M] International A level, Intl A Level, IAL, Edexcel, Pearson exam board, CIE, Cambridge exam board, P3, P2