Unit Circle Trig Values

Front

What is the radius of a unit circle?

Back

1

Front

What are the coordinates of the point on the unit circle at an angle of 0 radians?

Back

(1, 0)

Front

What are the coordinates of the point on the unit circle at an angle of π/2 radians?

Back

(0, 1)

Front

What are the coordinates of the point on the unit circle at an angle of π radians?

Back

(-1, 0)

Front

What are the coordinates of the point on the unit circle at an angle of 3π/2 radians?

Back

(0, -1)

Front

In which quadrants is sinθ positive?

Back

1st and 2nd quadrants

Front

In which quadrants is cosθ positive?

Back

1st and 4th quadrants

Front

What is the value of cos(π/3)?

Back

1/2

Front

What is the value of sin(π/6)?

Back

1/2

Front

What is the value of sin(π/4)?

Back

√2/2