Trigonometry: Finding the Length of the Hypotenuse of a Right Triangle

The video tutorial explains how to solve for the value of X in a right-angle triangle using trigonometry, specifically the cosine function. It begins by identifying the sides of the triangle and selecting the appropriate trigonometric function. The tutorial then demonstrates how to rearrange the equation to isolate X and solve for its value. The final answer is rounded to three significant figures, and the video concludes with an explanation of the marks awarded for each step and tips for solving similar problems.

How do you round the answer of 20.465 to three significant figures?

What are the three marks awarded for in Question 8 of the quiz?