Pre-Calculus Post Test

What is the circumference of a unit circle?

• 2π

• π

• 4π

• π2

If a central angle in a unit circle subtends an arc of length 2π, what is its angular measure in degrees?

• 180°

• 90°

• 360°

• 45°

Convert 150∘ to radians.

• π/6

• 5π/6

• 3π/2

• 7π/6

Convert π/4​ radians to degrees.

• 30°

• 60°

• 45°

• 90°

Which of the following angles is coterminal with 45∘?

• −315∘

• 60∘

• 400∘

• 300∘

Which is the circular function that corresponds to the ratio of the adjacent side to the hypotenuse in a right triangle?

• sine

• cosine

• tangent

• secant

What is the value of sin (30∘)

• 3/2

• 1/2

• 2

• 1

Which of the following is a reference angle for 210∘?

• 30∘

• 45∘

• 60∘

• 90∘

What is the domain of the function f(x)=sec?

• All real numbers

• x ≠ π/2+nπ, n ϵ Z

• x ≠ nπ, n ϵ Z

• x ≠ n π/3, n ϵ Z

What is the range of f(x)=cos(x)

• (−∞, ∞)

• [−1,1]

• [0, ∞)

• (0,1)