April 20, 2015

A Youtube video from ProfRobBob in which he uses the unit circle to explain why Tangent and Cotangent have a period of Pi instead of 2Pi like the other trig functions. He then graphs the two parent functions discussing domain and range as well.

Note: there may be a short ad at the beginning.

- Mathematics > General
- Mathematics > Algebra

- Grade 9
- Grade 10

Make sense of problems and persevere in solving them.

Reason abstractly and quantitatively.

Model with mathematics.

Use appropriate tools strategically.

Attend to precision.

Look for and make use of structure.

Graph exponential and logarithmic functions, showing intercepts and end behavior, and trigonometric functions, showing period, midline, and amplitude.