Trigonometric Functions and Triangle Sides

This video reviews trigonometry, focusing on finding triangle sides using sine, cosine, and tangent. It emphasizes setting calculators to degrees and provides examples for each trigonometric function to find missing sides of right triangles.

What is the primary goal of trigonometry in the context of triangles?

• To find the area of a triangle

• To find the missing sides of a triangle

• To calculate the perimeter of a triangle

• To determine the type of triangle

Which trigonometric function relates the opposite side and hypotenuse?

• Cosine

• Tangent

• Sine

• Secant

Before using trigonometric functions, what should you check on your calculator?

• Screen brightness

• Memory capacity

• Mode setting (degrees or radians)

• Battery level

In Example 1, what is the length of the opposite side when the hypotenuse is 10 and the angle is 30 degrees?

• 10

• 7

• 5

• 3

Which trigonometric function is used in Example 2 to find the adjacent side?

• Cosecant

• Tangent

• Cosine

• Sine

What is the length of the adjacent side in Example 2 when the hypotenuse is 10 and the angle is 30 degrees?

• 6.5

• 8.7

• 9.3

• 5.5

In Example 3, which function is used to find the hypotenuse when the opposite side is known?

• Sine

• Cosine

• Tangent

• Cotangent

What is the calculated hypotenuse in Example 3 when the opposite side is 8 and the angle is 60 degrees?

• 10.2

• 9.2

• 8.5

• 7.5

Which trigonometric identity is used in Example 4 to find the adjacent side?

• Sine

• Cosine

• Tangent

• Secant

In Example 4, what is the length of the adjacent side when the opposite side is known?

• 5.7

• 6.7

• 4.7

• 3.7