Unit Circle (version A) - Questionário
- 1. The magnitude of the radius of a unit circle is
A) 1
B) √2/2
C) r
D) π
E) √3/2
- 2. The sine of an angle is equal to
A) x
B) r
C) y
D) 1
E) theta
- 3. How many degrees in a unit circle?
A) 180
B) π
C) 1
D) 360
E) 2π
- 4. The cosine of an angle is equal to
A) 1
B) y
C) theta
D) r
E) x
- 5. The magnitudes of the maxima and minima of the unit circle's sine and cosine are the same.
A) false
B) true
C) Neither
D) Can't be determined
- 6. The range of a cosine curve from the unit circle
A) 0 to 2π
B) -1 to 1
C) 0 to 360
D) -infinity to +infinity
- 7. For the unit circle, the zero of the sine function occur
A) 90 and 270 degrees
B) neither 0 nor 180 degrees
C) 0 degrees
D) Both 0 and 180 degrees
E) 180 degrees
- 8. The maximum value of the cosine curve for the unit circle occurs at
A) 0 degrees
B) 90 degrees
C) 270 degrees
D) 180 degrees
- 9. For the unit circle, if I translate the sine curve XXX radians, it will be in the same position as the cosine curve.
A) -π/2
B) π/2
C) 2π
D) -π
E) π
- 10. The sine of 90 degrees equals
A) 1
B) -√2/2
C) √2/2
D) 0
E) 1/2
- 11. The cosine of 45 degrees equals
A) √3/2
B) 1/2
C) √2/2
D) 45
E) -√2/2
- 12. 390 degrees is co-terminal with
A) 330 degrees
B) -30 degrees
C) -390 degrees
D) 30 degrees
A) 1/2
B) √3/2
C) 0
D) 180 degrees
E) 1
- 14. π radians is co-terminal with
A) 1/2 radians
B) 3π radians
C) 3π/2 radians
D) -π radians
E) 2π radians
- 15. 3π/4 radians is the same as
A) 45 degrees
B) 135 degrees
C) 225 degrees
D) 315 degrees
E) 3π/2 radians
- 16. Sine and Cosine are both negative in quadrant
A) III
B) never
C) I
D) II
E) IV
- 17. How many radians in a unit circle?
A) 3π
B) 2π
C) π/2
D) π
E) 3π/2
- 18. One cycle of the sine and cosine curve from the unit circle have the same period.
A) Neither
B) True
C) False
D) Can't be determined
- 19. 180 degrees is equal to
A) π/2 radians
B) π radians
C) 360 degrees
D) 2π radians
- 20. The cosine function is negative and the sine function is positive in quadrant
A) I
B) II
C) IV
D) III
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