SAT II Math II : Radians and the Unit Circle

Study concepts, example questions & explanations for SAT II Math II

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Example Questions

Example Question #1 : Radians And The Unit Circle

The degree angle  can be expressed as what in radians?

Possible Answers:

Correct answer:

Explanation:

In order to convert degrees to radians, we will need to know the conversion factor.

Set up a dimensional analysis to solve.

The answer is:  

Example Question #2 : Radians And The Unit Circle

Which of the following angles belong in the fourth quadrant?

Possible Answers:

Correct answer:

Explanation:

The fourth quadrant is in the positive x-axis and negative y-axis.  

The angle ranges are:

The only possible answer is:  

Example Question #3 : Radians And The Unit Circle

What degree measure is equivalent to ?

Possible Answers:

Correct answer:

Explanation:

Every pi radians is equal to 180 degrees.

Replace the pi term with 180 degrees and multiply.

The answer is:  

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