82 57° 32°

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
ChapterCSR: Contents Of Student Resources
Section: Chapter Questions
Problem 1.39EP
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With this given triangle, how would I get the value of x? With the triangle having two degrees?

**Finding the Length of a Side in a Right Triangle**

**Problem Statement:**

**Find \( x \) correct to 2 decimal places.**

**NOTE: The triangle is NOT drawn to scale.**

**Diagram Description:**

- The given diagram represents a right triangle outlined in blue.
- The right angle is located at the bottom left corner of the triangle.
- One of the legs of the triangle adjacent to the right angle is labeled as 82 units.
- The angle opposite this leg is labeled as 57 degrees.
- The other non-right angle, adjacent to the unknown side \( x \), is labeled as 32 degrees.
- The base of the triangle, opposite the right angle, is designated as \( x \).

**To Solve:**

1. Use appropriate trigonometric ratios such as sine, cosine or tangent to find \( x \). 
2. Considering the given angles, the cosine of 57 degrees can be used since it relates the adjacent side (82 units) to the hypotenuse (x).

\[ \cos(57^\circ) = \frac{\text{adjacent}}{\text{hypotenuse}} = \frac{82}{x} \]

3. Solve for \( x \):

\[ x = \frac{82}{\cos(57^\circ)} \]

4. Calculate and round the result to 2 decimal places.

**Answer Box:**

\( x \approx \) [Input field]

**Question Help:**

- Worked Example 1
- Message instructor
Transcribed Image Text:**Finding the Length of a Side in a Right Triangle** **Problem Statement:** **Find \( x \) correct to 2 decimal places.** **NOTE: The triangle is NOT drawn to scale.** **Diagram Description:** - The given diagram represents a right triangle outlined in blue. - The right angle is located at the bottom left corner of the triangle. - One of the legs of the triangle adjacent to the right angle is labeled as 82 units. - The angle opposite this leg is labeled as 57 degrees. - The other non-right angle, adjacent to the unknown side \( x \), is labeled as 32 degrees. - The base of the triangle, opposite the right angle, is designated as \( x \). **To Solve:** 1. Use appropriate trigonometric ratios such as sine, cosine or tangent to find \( x \). 2. Considering the given angles, the cosine of 57 degrees can be used since it relates the adjacent side (82 units) to the hypotenuse (x). \[ \cos(57^\circ) = \frac{\text{adjacent}}{\text{hypotenuse}} = \frac{82}{x} \] 3. Solve for \( x \): \[ x = \frac{82}{\cos(57^\circ)} \] 4. Calculate and round the result to 2 decimal places. **Answer Box:** \( x \approx \) [Input field] **Question Help:** - Worked Example 1 - Message instructor
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