Unit Circle

Front

What is the value of cos(π/4)?

Back

√2/2

Front

What is the value of sin(2π/3)?

Back

√3/2

Front

What is the value of cos(π)?

Back

-1

Front

In which quadrants is tanθ positive?

Back

The 1st and 3rd quadrants

Front

What is the value of sin(7π/6)?

Back

-1/2

Front

Define the Unit Circle.

Back

A circle with a radius of 1 centered at the origin of a coordinate plane.

Front

What are the coordinates of the point at 0 radians on the Unit Circle?

Back

(1, 0)

Front

What are the coordinates of the point at π/2 radians on the Unit Circle?

Back

(0, 1)

Front

What is the relationship between sine and cosine on the Unit Circle?

Back

sin(θ) = y-coordinate, cos(θ) = x-coordinate.

Front

What is the value of tan(π/4)?

Back

1