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

• radian measure

• the length of the curve formed by an arc

• quadrantal angle

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

• Pythagorean Identity

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

• arc length

• an angle whose terminal sides lies on an axis

• radian

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

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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