Sine, Cosine, and Tangent of Unit Circle

The hypotenuse of any right triangle from the center of the unit circle to an edge is always

• 1

• sqt2/2

• sqt3/2

• 1/2

Based on your unit circle cos(90^o)=

• 0

• -1

• 1/2

• 1

Based on your unit circle sin(0^o)=

• 1

• -1

• 0

• 1/2

For what angles are sine and cosine the same?

• 0^o

• 45^o and 135⁰

• 45^o and 225⁰

• 45^o and 315⁰

Tangent is...

• Opposite/hypotenuse

• sine/cosine

• neither a or b

• both a and b

On a point in the unit circle (x,y) the x value is the

• cosine

• tan

• sine

• tangent

Find the point on the Unit Circle associated with the angle 5π/3

• (1 / 2 , 1 / 2)

• (-√3 / 2 , 1/2)

• (1 / 2 , -√3 / 2)

• (-√3 / 2 , -1/2)

Find the point on the Unit Circle associated with the angle 5π/3

• (1 / 2 , 1 / 2)

• (-√3 / 2 , 1/2)

• (1 / 2 , -√3 / 2)

• (-√3 / 2 , -1/2)

Which of the following points is in the unit circle?

• (1 / 2 , 1 / 2)

• (-√2 / 2 , -√2 / 2)

• (√2 / 3 , -√2 / 3)

• (3 / 2 , 2 / 3)

What point corresponds to an angle of 5π/2 radians on the unit circle?

• (-1,1)

• (1,1)

• (-1,-1)

• (0,1)