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# Circular Functions Quiz

1) If point P is located at on the unit circle, what is sin Î and cos Î?

**A.**

**B.**

**C.**

**D.**

2) If point P is located at on the unit circle, what is sin Î and cos Î?

**A.**

**B.**

**C.**

**D.**

3) Find the value of cos 420Â°.

**A. **

**B. **

**C. **

**D. **

4) Which of the following is equal to sin?

**A. **

**B. **

**C. **

**D. **

5) What is the period of the function shown below?

**A. **

**B. **

**C. **

**D. **

6) What is the period of the function shown below?

**A. **

**B. **

**C. **

**D. **

7) Which of the following is equal to cos 440Â°?

A. cos 620Â°

B. cos 350Â°

C. cos 260Â°

D. cos 80Â°

8) When a guitar string is plucked, it is displaced from a fixed point in the middle of the string and vibrates back and forth, producing a musical tone. The exact tone depends on the frequency, or number cycles per second, that the string vibrates. To produce an G, the frequency is 390 cycles per second, or 390 hertz. What is the period of this function?

A. 6/5 seconds

B. 0.02 seconds

C. 0.0025 seconds

D. 11.3 seconds

9) In a certain area of forested land, the population of rabbits R increases and decreases periodically throughout the year. If the population can be modeled by, where d represents the dth day of the year, what is the population on the 300th day of the year?

A. 132 rabbits

B. 220 rabbits

C. 532 rabbits

D. 620 rabbits

10) Which of the following functions is not periodic? Assume that no function has a period greater than 2Ï.

**A.**

**B.**

**C.**

**D.**