Unit Circle Trigonometry

Front

What is the definition of the unit circle?

Back

The unit circle is a circle with a radius of 1 centered at the origin (0,0) in the coordinate plane. It is used to define trigonometric functions.

Front

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

Back

(1, 0)

Front

What is the sine of an angle in the unit circle?

Back

The sine of an angle is the y-coordinate of the point on the unit circle corresponding to that angle.

Front

What is the cosine of an angle in the unit circle?

Back

The cosine of an angle is the x-coordinate of the point on the unit circle corresponding to that angle.

Front

What is the tangent of an angle in the unit circle?

Back

Front

What is the value of cos 30°?

Back

Front

What is the value of sin 45°?

Back

Front

What is the value of tan 60°?

Back

Front

Back

Front

Convert 90 degrees to radians.

Back