10
QuizMultiple Choice

The Unit Circle

Question 10 • Applications and Modeling

What is the range of a sine function?

Answer
A
irrational numbers
B
negative numbers
C
All real numbers between -1 and 1 including -1 and 1
D
All real numbers between -2 and 2 including -2 and 2

Explanation

For the basic sine function, the output values range from −1 to 1, and both endpoints are included. Therefore, its range is all real numbers between −1 and 1, including −1 and 1.

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