Unit 6a Lesson 5

If θ is an angle on the unit circle, what is the value of cos²θ + sin²θ ?

• 1

• 3.14

• 2

• 2π

Tags

CCSS.HSF.TF.C.8

If the point (x, y) is on the unit circle, what is the value of x² + y² ?

• 1

• 3.14

• 2

• 2π

• (cos , sin )

Tags

CCSS.HSF.TF.A.2

Here is a unit circle with point P rotated π/3 radians counterclockwise.

What are the exact coordinates of P?

• (cos P, sin P)

• (cos π/3, sin π/3)

• (sin π/3, cos π/3)

• (about 0.5, about 0.9)

• (sin P, cos P)

Tags

CCSS.HSF.TF.A.2

Write the (x,y) coordinates for P in terms of cosine and sine.

• (cosθ, sinθ)

• (sinθ, cosθ)

• (cos x, sin y)

• (sin x, cos y)

Tags

CCSS.HSF.TF.A.2

What are the coordinates of point A?

Select ALL that apply.

• (-0.97, 0.26)

• (0.87, 0.5)

Tags

CCSS.HSF.TF.A.2

What are the coordinates of point Q?

Select ALL that apply.

• (-0.71, -0.71)

• (0.71, 0.71)

Tags

CCSS.HSF.TF.A.2

What are the coordinates of point A?

Select ALL that apply.

• (-0.71, -0.71)

• (0.71, 0.71)

Tags

CCSS.HSF.TF.A.2

If θ is an angle on the unit circle, what is the value of cos²θ + sin²θ ?

• 1

• 3.14

• 2

• 2π

Tags

CCSS.HSF.TF.C.8

If the point (x, y) is on the unit circle, what is the value of x² + y² ?

• 1

• 3.14

• 2

• 2π

• (cos , sin )

Tags

CCSS.HSF.TF.A.2

Use your calculator and maybe some scratch paper.

Is the point (0.5, 0.7) on the unit circle?

• Yes :)

• No :(

Tags

CCSS.HSF.TF.A.2