Introduction to Unit Circle

The x value on the unit circle is defined by which function?

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CCSS.HSF.TF.A.2

The y value on the unit circle is defined by which function?

Tags

CCSS.HSF.TF.A.2

Why do we want to think of trig functions instead of triangle trig when we start looking at the unit circle?

Tags

CCSS.HSF.TF.A.2

Estimate the value of \theta

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CCSS.HSF.TF.A.2

What is the radius of the unit circle?

• 0

• 1

• 1/2

• √2/2

Tags

CCSS.HSF.TF.A.2

Match the following vocabulary related to the Unit Circle

• Pythagorean Identity

• the length of the curve formed by an arc

• radian

• an angle whose terminal sides lies on an axis

• radian measure

• states that the square of the cosine of a given angle + the square of the sine of that angle = 1

• arc length

• measure of a central angle of a circle that intercepts an arc = in length to the r of that circle

• quadrantal angle

• the ratio of the arc length formed by an angle divided by the r of that circle

Tags

CCSS.HSF.TF.A.1

What is the radius of a unit circle?

• 1

• 2

• 1/2

• 0

Tags

CCSS.HSF.TF.A.2

• Choice 1

• Choice 2

• Choice 3

• Choice 4

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CCSS.HSF.TF.A.2

What is this jawnski called?

Tags

CCSS.HSF.TF.A.2

Select ALL that apply: Which of the following is a point on the unit circle?

• (1, 1)

• (-1, 0)

Tags

CCSS.HSF.TF.A.2