How to use special right triangles to find the value for cosine of 60 degrees

What is the ratio of the sides in a 30-60-90 triangle?

• 1:1:√2

• 1:1:1

• 1:√3:2

• 1:2:√3

In a 30-60-90 triangle, if the shortest side is 'x', what is the length of the hypotenuse?

• x√3

• x/2

• x

• 2x

How do you calculate the cosine of 60 degrees using a 30-60-90 triangle?

• Adjacent side divided by hypotenuse

• Hypotenuse divided by adjacent side

• Opposite side divided by hypotenuse

• Adjacent side divided by opposite side

What is the cosine of 60 degrees?

• 1

• 0

• 0.866

• 0.5

What should you expect when you calculate the cosine of 60 degrees on a calculator?

• 0.5

• 0.707

• 0.866

• 1