Tangent and Unit Circle

Based on your unit circle sin(90^o)=

• 1/2

• 0

• -1

• 1

A tangent line intersects a circle at __________________

• One point

• Two points

• More than two points

• It does not intersect a circle.

A tangent line and a radius drawn to the point of tangency are ________________________

• Congruent

• Parallel

• Perpendicular

• No relationship

• 20.2

• 13.0

• 25.7

• 30.1

In the figure, \overline{AB} is tangent to circle O. OB=35 and the radius has a length of 14 units. Find the length of the tangent segment.

• 37.7 units

• 32.1 units

• 35.0 units

• 49.0 units

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

• y/r

• x/r

• r/y

• y/x

tan(0^o)

• 1

• 0

• √2

• UND

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

What is the radius of the unit circle?

• 0

• 1

• 1/2

• √2/2