Special Right Triangles Cosine, Sine and Tangent

Susan is flying a kite, which gets caught in the top of a tree.  Use the diagram to estimate the height of the tree. 

• 63 ft

• 65 ft

• 74 ft

• 87 ft

What is the ratio for Cosine?

• Opposite Leg / Adjacent Leg

• Opposite Leg / Hypotenuse

• Adjacent Leg / Hypotenuse

• Hypotenuse / Adjacent Leg

What is the sine of angle C?

• 7/24

• 7/25

• 24/25

• 25/24

What is the tangent of angle C?

• 7/25

• 25/7

• 7/24

• 24/7

What type of special triangle is this?

• 45°-45°-90°

• 30°-60°-90°

• Equiangular

• Equilateral

Find x.

• 10

• √3

• 5

• 10√3

Find x - the length of the hypotenuse of the triangle.

• 5

• 5√2

• 10

• 5√3

What is the cosine of θ?

• 15/8

• 15/17

• 17/15

• 8/15

If tanθ = 3/4, what is cosθ?

• 3/5

• 4/5

• 4/3

• not enough information

If the sinθ=7/12, what is cosθ?

• 12√95/95

• 12/95

• 12/√95

• √95/12