The Unit Circle Quiz Answers

Which of the following best explains why tan5π/6 ≉ tan 5π/3?

Tangent is positive in the second quadrant and negative in the fourth quadrant. (Wrong)

which of the following best explains why cos 2 pi/3 =/ cos 5 pi/3?

cosine is negative in the second quadrant and positive in the forth quadrant.

Which equation can be used to determine the reference angle, r, if 0 = 7 pi/12?

r = 0 - pi (wrong)

Which expression is equivalent to sin 7π/6?

Sin 11π/6

What is the value of tan 0 in the unit circle below?

√3/2 (wrong)

The terminal side of an angle measuring π/6 radians intersects the unit circle at what point?

(square 3/2, 1/2)

On the unit circle, where 0<0<= 2π, when is tan 0 undefined?

0= π/2 and 0=3π/2

Which expression can be used to determine the reference angle for an angle, x, measuring 150 degrees?

180 - x

What is the value of sin 0 in the diagram below?

24/25

What is the value of cos 0 in the diagram below?

4/5 (wrong) 3/4 (wrong)