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:

International A level, Intl A Level, IAL, Edexcel, Pearson exam board, CIE, Cambridge exam board, P3, P2

[FirstnameLastname-bxzk]

Best math YouTuber ever, I feel like I hit a gold mine lol

[treskilion-]

Sir, you are undoubtedly one of the best instructors I have ever seen. Thank you so much for putting out amazing content such as this on YouTube.

[WidanBadshah]

When I acquire my 1st engineering job, a house and a relationship, I'm sure as hell donating an arm and a leg to you Professor Davis, because you are the reason why I'm succeeding in my college career.

[kiwitex]

Yet again, thank you so much for all the time you've spent putting this series together. I'd be completely lost without your clear, to the point and logical explanations.

[sallybugs]

Thank you so much this channel is great

[alemswazzu]

Thank you so much for your hard work..

[pavelkoprivec]

If you visualise extended hypothenuse as a tangent line and as it travels in circles the slope corresponds to graph of the tan function.

[ManuelUlliac]

I start to realize we should probably use a cylinder to depict the unit circle. The wall of the cylinder is the graph of the functions.