Math Problem Statement

Solve

A triangular truss is shown in the figure. Find angle θ.

Solution

To solve for angle θ\theta in the triangle, we will use trigonometric ratios. Here's the approach:

Step 1: Identify the triangle and values

  • Opposite side to θ\theta: 8ft8 \, \text{ft}
  • Adjacent side to θ\theta: 10ft10 \, \text{ft}

Step 2: Use the tangent function

The tangent of angle θ\theta is the ratio of the opposite side to the adjacent side: tan(θ)=oppositeadjacent\tan(\theta) = \frac{\text{opposite}}{\text{adjacent}} Substitute the values: tan(θ)=810=0.8\tan(\theta) = \frac{8}{10} = 0.8

Step 3: Solve for θ\theta

To find θ\theta, take the inverse tangent (tan1\tan^{-1}) of 0.80.8: θ=tan1(0.8)\theta = \tan^{-1}(0.8)

Using a calculator: θ38.66\theta \approx 38.66^\circ

Step 4: Round to the nearest degree

θ39\theta \approx 39^\circ

Final Answer:

θ39\theta \approx 39^\circ

Do you need further clarification or details? Here are some questions you might consider:

  1. What is the significance of using tangent over sine or cosine?
  2. How can I solve similar problems without a calculator?
  3. Can we confirm this answer using another trigonometric function?
  4. How does the precision of values affect the result?
  5. How would this process differ for an obtuse triangle?

Tip: Always double-check which side is the opposite, adjacent, or hypotenuse when using trigonometric functions!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Trigonometry
Right Triangles

Formulas

tan(θ) = opposite / adjacent
θ = tan⁻¹(opposite / adjacent)

Theorems

Definition of tangent in a right triangle

Suitable Grade Level

Grades 9-12