Trig Applications and Unit Circle Quick Check

Front

What is the value of cos(5π/3)?

Back

1/2

Front

What are the exact coordinates of 3π/4 on the unit circle?

Back

(−√2∕2, √2∕2)

Front

What is the value of sin(π/2)?

Back

1

Front

What is the value of cos(30°)?

Back

√3/2

Front

What is 7π/4 radians in degrees?

Back

315°

Front

Define the unit circle.

Back

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

Front

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

Back

The y-coordinate of the point where the terminal side of the angle intersects the unit circle.

Front

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

Back

The x-coordinate of the point where the terminal side of the angle intersects the unit circle.

Front

What is the relationship between degrees and radians?

Back

180° is equivalent to π radians.

Front

What is the value of cos(π)?

Back

-1