Evaluating Trig Functions on the Unit Circle

Label the correct spots

a

b

c

tan(3pi/2) = undefined

tan 7π/4 ​

Mathematical Equivalence

ON

sin 60° = ​ ​ (a)   / ​ ​ (b)  

​ ​ ​

• 2

• 1

cos(5π/3)

• -√2/2

• -1/2

• 1/2

• √3/2

cos(30^o)

• - ½

• √3/2

• 2√3 /3

• ½

Choose the best match for the graph.

• 30^o

• 45^o

• 60^o

• 90^o

Choose the best match for the graph.

• 30^o

• 45^o

• 60^o

• 90^o

Based on the unit circle, what is the value of sin?

• y

• x

• x/y

• y/x

What is the radius of the unit circle?

• 0

• 1

• 1/2

• √2/2