MAT 161
Reading and Video #15

Read
p. 149-150 Chapter 2 summary

Video
Trig and the unit circle:
https://www.khanacademy.org/math/trigonometry/basic-trigonometry/unit_circle_tut/v/example-unit-circ-def

https://www.khanacademy.org/math/trigonometry/basic-trigonometry/unit_circle_tut/v/finding-trig-function-values-using-unit-circle-definition

Section 3.1
Finding derivatives with the product rule:
https://www.khanacademy.org/math/calculus/differential-calculus/product_rule/v/applying-the-product-rule-for-derivatives