7.1 Practice Problems

Front

How many degrees is π/2 radians?

Back

90°

Front

Which point is the center of the unit circle?

Back

(0,0)

Front

What is the radius of the unit circle?

Back

1

Front

What is sin 45°?

Back

√2/2

Front

What are the exact coordinates of 3π/4 on the unit circle?

Back

(−√2/2, √2/2)

Front

What is the relationship between radians and degrees?

Back

180° = π radians.

Front

What is the value of cos 0°?

Back

1

Front

What is the value of tan 45°?

Back

1

Front

What is the value of sin 30°?

Back

1/2

Front

What is the value of cos 30°?

Back

√3/2