Evaluating Trig Functions Given a Point on a Circle

cos (π/4)

• √3/2

• √2/2

• 1/2

• 1

cos(π)

• √3/2

• -√2/2

• -1

• 1

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

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

• y

• x

• x/y

• y/x

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

• y/r

• x/r

• r/y

• y/x

cos(2π)

• 0

• 1

• UND

• -1

At what point are sine and cosine the same value?

• 0

• 90

• 45

• 60

cos 4π/3

• -√3/2

• √3/2

• 1/2

• -1/2