Evaluate Trigonometric Functions with Unit Circle

Find the measure of each angle

• a

• b

• c

• d

What is the reference angle for 240 degrees?

• 60 degrees

• 30 degrees

• 45 degrees

• 210 degrees

What quadrant is 7π/3?

• I

• II

• III

• ^IV

cos 5π/6

• -1/2

• 1/2

• √3/2

• -√3/2

cos 4π/3

• -√3/2

• √3/2

• 1/2

• -1/2

tan 270

• 0

• 1

• -1

• undefined

Evaluate the trigonometric functions using your unit circle.

• 2

• (2√3)/3

• 1/2

• √3/2

Evaluate the trigonometric functions using your unit circle.

• √2

• √2/2

• -√2

• -√2/2

Evaluate the trigonometric functions using your unit circle.

• -√3/2

• √3/2

• 1/2

• -1/2

Evaluate csc (2π)

• 1

• 0

• 2

• ∅ (undefined)