Special Right Triangle Precalculus Review

This is a 45, 45, 90 degree triangle. Which two sides would be marked with an L?

• AB

• BC

• CA

Answer explanation

L can be replaced with any variable.

• AB

• BC

• CA

Answer explanation

L can be replaced with any variable.

• AB

• BC

• CA

Answer explanation

L can be replaced with any variable.

Which trigonometric functions is the opposite over the adjacent?

• Tangent

• Sine

• Cosine

• Secant

Answer explanation

Tangent is written as tan(x).

Find the value of x.

• 3 sqrt(2)

• 3

• 6 sqrt(2)

• 6

What are x and y in this 30-60-90 triangle?

• x = 6 y = 3√3

• x = 3√2 y = 3

• x = 3√3 y = 6

• x = 6 y = 3√2

• y = 4

• y = 8

What is the value of cos(60°)?

• 0.5

• 0.577...

• 0.866...

• 2

Find the value of y.

• 7

• 7√3

• 14√3

• (14√3)/3

What is the length of y in this 45-45-90 triangle?

• 8√2

• 4√2

• 4

• 8