Week Four Assignments (Friday, May 1-Thursday, May 7)
Web-Based
Khan Academy PreCalc
Sign up using code 5MZYYYJC.
You’ll work on trigonometric concepts.
Non Web-Based
Graph each function. Use radians for the domain (along the x-axis).
1. f(x)= cos 𝜃
2. g(x) = 5 cos 𝜃 -2
3. h(x) = -cos (𝜃-(𝝿/3))
Solutions to Week 4
1. Graph the basic cosine function with the five key points for interval [0,𝛑] are:
(0,1), (𝛑/2, 0), (𝛑, -1), (3𝝿/2, 0), (2𝛑, 1).
2. This cosine graph has an altitude of 5 and is then displaced two (2) units down. The five key points are for interval [0,𝛑] are:
(0,3), (𝛑/2, -2), (𝛑, -7), (3𝝿/2, -2), (2𝛑, 3).
3. This cosine graph is inverted, then shifted horizontally by 𝝿/3 to the right. The five key points are for interval [0,𝛑] are: (𝝿/3, -1), (5𝛑/6,0), (4𝛑/3, 1), (11𝝿/6, 0), (7𝝿/3, -1)