Evaluating Trig. Functions using the Unit Circle

Front

How many degrees is π/6 radians?

Back

30°

Front

In which quadrants is cosθ positive?

Back

The 1st and 4th quadrants.

Front

How many degrees is π/4 radians?

Back

45°

Front

How many degrees is π/2 radians?

Back

90°

Front

How many degrees is π/3 radians?

Back

60°

Front

What is the value of sin(π/6)?

Back

1/2

Front

What is the value of cos(π/3)?

Back

1/2

Front

What is the value of tan(π/4)?

Back

1

Front

What is the reference angle for 210°?

Back

30°

Front

What is the value of sin(π/2)?

Back

1