Sin, Cos, Tan 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(30^o)=

• 1

• 1/2

• sqt3/2

• sqt2/2

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

• 1

• -1

• 0

• 1/2

Tangent is...

• a. Opposite/hypotenuse

• b. sine/cosine

• c. neither a or b

• d. both a and b

For what angles are sine and cosine the same?

• 0^o

• 45^o and 135⁰

• 45^o and 225⁰

• 45^o and 315⁰

Based on the unit circle, what is the value of tan?

• y/r

• x/r

• r/y

• y/x

Based on the unit circle, what is the value of cos?

• y

• x

• x/y

• y/x

What is the radius of the unit circle?

• 0

• 1

• 1/2

• √2/2

cos (π/4)

• √3/2

• √2/2

• 1/2

• 1

sin(315^o)

• √2/2

• -√3/2

• ½

• -√2/2