Evaluation and Converting Trig Values on the Unit Circle

Find sin(-240°)

• (√3)/2)

• (-1/2)

• (√2/2)

• (1/2)

Find cos(600°)

• (-1/2)

• (-√3/2)

• (√3/2)

• (√2/2)

sin π/4

• √2∕2

• 1/2

• √3/2

• 0

sec 3π/2

• 0

• undefined

• 1

• -1

cos 5π/6

• -1/2

• 1/2

• √3/2

• -√3/2

cos 4π/3

• -√3/2

• √3/2

• 1/2

• -1/2

sin 7π/6

• 1/2

• -1/2

• √3/2

• -√3/2

sin 2π/3

• 1/2

• -1/2

• √3/2

• -√3/2

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1

• sqt2/2

• sqt3/2

• 1/2

Based on your unit circle sin(30^o)=

• sqt2/2

• 1/2

• 1

• sqt3/2