Circle Unit Sine Cosine Tangent

What is the radius of the unit circle?

• 0

• 1

• 1/2

• √2/2

What is the ratio for Tangent

• Opp/Adj

• Adj/Opp

• Opp/Hyp

• Hyp/Opp

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

• 1

• 0

• -1

• 1/2

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

• 1/2

• 0

• -1

• 1

Using the unit circle x-values correspond to ​ (a)   , y-values correspond to ​ (b)   , and y-values divided by x-values correspond to ​ (c)  

• cosine

• sine

• tangent

• secant

• cosecant

• cotangent

• undefined

Answer explanation

The cosine of an angle is negative. In which quadrant(s) can the solution be found.

• Quadrant 1

• Quadrant 2

• Quadrant 3

• Quadrant 4

• cosθ

• sinθ

• OP

• 1

Which best describes the function shown in the graph?

• The function can measure the vertical displacement from the x-axis on the unit circle as angle moves in a counterclockwise direction.

• The function can measure the horizontal displacement from the x-axis on the unit circle as angle moves in a counterclockwise direction.

• The function can measure the vertical displacement from the y-axis on the unit circle as angle moves in a counterclockwise direction.

• The function can measure the horizontal displacement from the y-axis on the unit circle as angle moves in a counterclockwise direction.

Tangent is...

• Opposite side / hypotenuse

• sine/cosine

• neither a or b

• both a and b