Evaluate Trigonometric Functions with Unit Circle

Which statement correctly answers the following? sin (π/4)

• The y-coordinate at π/4 is √2 / 2

• The x-coordinate at π/4 is √3 / 2

• The x-coordinate at π/4 is -√2 / 2

• The y-coordinate at π/4 is 1 / 2

Given the point (-1,0), which radian value are you at on your Unit Circle?

• π

• π/2

• 3π/2

• 2π

Evaluate!!!

sin (60^o) = _____

• √3 / 2

• 1 / 2

• √2 / 2

• 1

Which quadrant are you given that Cos X is the only function that's positive?

• Q4

• Q3

• Q2

• Q1

Evaluate!!!

cos (5π/3)

• 1 / 2

• - √3 / 2

• √3 / 2

• - 1 / 2

Which of the following statements about Quadrant 4 is true?

• Contains the degrees 300^o, 315^o, 330^o

• (-x, y)

• Sin is Positive

• Contains the radians π/3, π/4, π/6

Which pair of co-terminal angles corresponds with the principal angle of 225^o?

• 585^o, -135^o

• 535^o, -185^o

• 595^o, -145^o

• 45^o, -405^o

What are the (x, y) coordinates on the Unit Circle at 30^o or π/6?

• (1 / 2, √3 / 2)

• (√2 / 2, √2 / 2)

• (√3 / 2, 1 / 2)

• (0, 1)

Which pair of co-terminal angles corresponds with the principal angle of 30^o?

• 390^o, -330^o

• 360^o, -300^o

• 300^o, -390^o

• 210^o, -150^o

Evaluate the trigonometric functions using your unit circle.

• √3/2

• 1/2

• -1/2

• -√3/2