How to use the cosine function to find the missing side of a triangle
Interactive Video
•
Mathematics
•
11th Grade - University
•
Practice Problem
•
Hard
Wayground Content
FREE Resource
The video tutorial explains how to identify the adjacent side in a right triangle when given the hypotenuse. It demonstrates using the cosine function to solve for the unknown side length, X, by setting up the equation cosine of 32 degrees equals X over 5. The tutorial guides students through solving the equation by multiplying both sides by 5 and using a calculator to find the approximate value of X, rounded to the third decimal place.
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2 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
What should you ensure about your calculator mode when calculating cosine values?
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
What is the approximate value of X when calculated as 5 times cosine of 32 degrees, rounded to the third decimal place?
Evaluate responses using AI:
OFF
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