Exploring 30-60-90 Triangles and Trigonometric Functions

What is the length across the 30-degree angle in a 30-60-90 triangle?

• 3

• 1 times root 3

• 2

• 1

What is the sine of 30 degrees?

• 1/2

• 2

• root 3/2

• 1

What is the cosecant of 30 degrees?

• 1/2

• 2

• root 3/2

• 1

What is the cosine of 30 degrees?

• 1/2

• root 3/3

• 2

• root 3/2

What is the tangent of 30 degrees?

• root 3

• root 3/3

• 1/2

• 2

What is the cotangent of 30 degrees?

• root 3

• root 3/3

• 2

• 1/2

What is the sine of 60 degrees?

• 1/2

• 2

• root 3/2

• root 3

What is the cosine of 60 degrees?

• root 3

• 2

• 1/2

• root 3/2

What is the tangent of 60 degrees?

• 1/2

• root 3/2

• 2

• root 3

How can special triangles be used in trigonometry?

• To memorize the unit circle

• To evaluate common angles

• To calculate circle areas

• To understand square roots