Unit Circle Trig 1

Front

What does the unit circle represent in trigonometry?

Back

The unit circle is a circle with a radius of 1 centered at the origin of a coordinate plane, used to define trigonometric functions based on angles.

Front

What is the value of the radius of the unit circle?

Back

1

Front

In the unit circle, what does the x-coordinate represent?

Back

The x-coordinate represents the cosine of the angle.

Front

In the unit circle, what does the y-coordinate represent?

Back

The y-coordinate represents the sine of the angle.

Front

What is the sine of 30 degrees?

Back

1/2

Front

What is the cosine of 60 degrees?

Back

1/2

Front

What is the tangent of 45 degrees?

Back

1

Front

What is the value of cos(30 degrees)?

Back

√3/2

Front

What is the value of sin(90 degrees)?

Back

1

Front

What is the relationship between sine and cosine in the unit circle?

Back

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