Evaluating Trigonometric Functions Using the Unit Circle

Front

In which quadrants is cosθ positive?

Back

cosθ is positive in the 1st and 4th quadrants.

Tags

CCSS.HSF.TF.A.2

Front

What is the radius of a unit circle?

Back

The radius of a unit circle is 1.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of sin 7π/6?

Back

sin 7π/6 = -1/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of csc(7π/6)?

Back

csc(7π/6) = -2.

Tags

CCSS.HSF.TF.A.2

Front

What is the exact value of sin 150°?

Back

sin 150° = 1/2.

Tags

CCSS.HSF.TF.A.2

Front

What is the definition of a unit circle?

Back

A unit circle is a circle with a radius of 1 centered at the origin of a coordinate plane.

Tags

CCSS.HSF.TF.A.2

Front

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

Back

The coordinates are (1, 0).

Tags

CCSS.HSF.TF.A.2

Front

What is the value of cos 90°?

Back

cos 90° = 0.

Tags

CCSS.HSF.TF.A.2

Front

What is the value of sin 270°?

Back

sin 270° = -1.

Tags

CCSS.HSF.TF.A.2

Front

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

Back

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

Tags

CCSS.HSF.TF.A.2