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

The video tutorial explains how to calculate the cosine of 59 degrees, emphasizing the importance of setting the calculator to degree mode. It guides through the process of performing the calculation and rounding the result to the nearest thousandth.

What trigonometric function is used to solve for a side of a triangle in this lesson?

• Secant

• Tangent

• Sine

• Cosine

When using a calculator for trigonometric calculations involving degrees, which mode should it be set to?

• Radian mode

• Scientific mode

• Degree mode

• Graphing mode

What is the first step to ensure your calculator is ready for trigonometric calculations in degrees?

• Press the power button twice

• Highlight Degree mode

• Switch to Radian mode

• Turn off the calculator

What operation is performed with the number 5 in the calculation process?

• Multiplication

• Subtraction

• Division

• Addition

To what decimal place is the final result rounded in the calculation?

• Nearest thousandth

• Nearest hundredth

• Nearest tenth

• Nearest whole number