Unit Circle & Trig. Functions

Front

What is the exact value of sin 150°?

Back

1/2

Front

In which quadrants is cosθ positive?

Back

The 1st and 4th quadrants

Front

What is sec 3π/2?

Back

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Front

What is the value of sin π/4?

Back

√2∕2

Front

What is the value of cos 5π/6?

Back

-√3/2

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

Back

(1, 0)

Front

What is the value of tan(θ) in terms of sine and cosine?

Back

tan(θ) = sin(θ) / cos(θ)

Front

What is the value of sin 90°?

Back

1