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, which coordinate represents cosine?

Back

x-coordinate.

Front

In the unit circle, which coordinate represents sine?

Back

y-coordinate.

Front

What is the value of tan(45°)?

Back

1

Front

What is the cosine of 30°?

Back

√3/2.

Front

What is the sine of 30°?

Back

1/2.

Front

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

Back

Sine and cosine are the y and x coordinates of a point on the unit circle, respectively.

Front

What is the formula for tangent in terms of sine and cosine?

Back

tan(θ) = sin(θ) / cos(θ).

Front

What are the coordinates of the point on the unit circle at 0°?

Back

(1, 0).