# Points, Vectors, and Functions

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### Exercises

Page (3 of 5) Exercises:   1    2    3    4    5

#### Exercise 3

Exercise. Determine if each graph is a reasonable graph of the given equation.

• \item $r = cos \frac{&theta;}{2}$ for $0&le; &theta; &le; &pi;$ PICTURE graph this (the correct graph)