4.5 The Unit Circle

Front

What is the value of sin(π/2)?

Back

1

Front

Evaluate csc(3π/4).

Back

√2

Front

What is the value of cos(5π/3)?

Back

1/2

Front

What is sec(3π/2)?

Back

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Front

What is the value of sin(0)?

Back

0

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 on the unit circle at an angle of π/4?

Back

(√2/2, √2/2)

Front

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

Back

sin(θ) = y-coordinate, cos(θ) = x-coordinate of the point on the unit circle.

Front

What is the value of tan(π/3)?

Back

√3

Front

What is the value of csc(π/6)?

Back

2