MATH 3 / UNIT 8 Rehearse Grade

• 260°

• 520°

• 540°

• 400°

A circle has a diameter of 14 inches. What is the radian measure of a central angle that intercepts an arc of length 21 inches?

• 3 radians

• 2 radians

• 1.5 radians

• 1 radian

What is the exact value of sin(π/3)?

• 1/2

• √3/2

• √2/2

• 1

On a unit circle, the ordered pair (x, y) represents the point where the terminal side of θ intersects the unit circle. If m∠θ = 3π/4, what is the value of x in simplest form?

• -√2/2

• √3/2

• -1/2

• 0

On a unit circle, the ordered pair (x, y) represents the point where the terminal side of θ intersects the unit circle. If m∠θ = 240°, what is the value of y in simplest form?

• -√3/2

• -1/2

• √2/2

• √3/2

The y-coordinate of point M is -1/2. What is the measure of θ to the nearest thousandth of a radian?

• 3.667

• 5.759

• 2.618

• 4.189

• Amp: 3, Midline: -3, Period: 10π

• Amp: -3, Midline: -3, Period: 5π

• Amp: -3, Midline: -3, Period: 10π

• Amp: 3, Midline: 0, Period: 5π

What is the amplitude of the function shown in the graph below?

The cosine curve below represents the amount

of precipitation by season in a region of the

savannah of Africa. The highest average amount

of precipitation is 190 cm/month in the rainy

season, but it goes down to 8 cm/month in the

dry season. Based on the values, what is the

amplitude of this cosine function?

• 91
• 99

• 182

• 8

For the function y = -4sin(4x) - 2, identify the following:

• Amp: 4, Mid: -2, Period: π/2, Max: 2, Min: -6

• Amp: 4, Mid: 0, Period: π/2, Max: 4, Min: -4

• Amp: 4, Mid: -2, Period: π/4, Max: 2, Min: -6

• Amp: 4, Mid: -2, Period: π/2, Max: 2, Min: -2