Understanding Sin 60 and Special Triangles

What is the value of sin 60 when calculated using a calculator?

• 0.707

• 1.0

• 0.866

• 0.5

In a 30-60-90 triangle, what is the ratio of the sides opposite to 30°, 60°, and the hypotenuse?

• 1:√3:2

• √3:1:2

• 1:1:√2

• 1:2:√3

Which side is the longest in a 30-60-90 triangle?

• The side opposite 30°

• The side opposite 45°

• The hypotenuse

• The side opposite 60°

What is the value of sin -60?

• -0.5

• -0.866

• 0.866

• 0.5

Why is the opposite side negative in the calculation of sin -60?

• Because the opposite side is below the x-axis

• Because the angle is in the second quadrant

• Because the hypotenuse is negative

• Because the angle is in the first quadrant