Learn how to use cosine to find the missing side of a triangle

The video tutorial explains trigonometric relationships, focusing on cosine. It covers how to identify adjacent and hypotenuse sides in a right triangle and solve for unknowns using the cosine ratio. The tutorial emphasizes not converting decimals until the end and provides a conceptual understanding of cosine using the unit circle. It concludes with a practical application using a calculator.

What is the relationship between the adjacent side and the hypotenuse in a right triangle?

• Tangent of the angle

• Cosine of the angle

• Sine of the angle

• Secant of the angle

When solving for x in the equation x * cos(60°) = 5, what is the first step?

• Divide both sides by 5

• Subtract 5 from both sides

• Add x to both sides

• Multiply both sides by x

Why is it recommended not to convert cosine values to decimals until the end of the calculation?

• To avoid rounding errors

• To make the calculation faster

• To simplify the equation

• To ensure the calculator is used correctly

What is the value of cosine of 60 degrees?

• 0

• √3/2

• 1

• 1/2

If 5 divided by 1/2 equals 10, what does this imply about the division of fractions?

• Dividing by a fraction results in a negative number

• Dividing by a fraction is the same as multiplying by its reciprocal

• Dividing by a fraction results in a smaller number

• Dividing by a fraction is the same as subtracting it