Q35. Solve triangle ABC using the giv... [FREE SOLUTION]

Chapter 13: Q35. (page 707)

Solve triangle ABC using the given measurements if $B = 18 {}^{鈭�}, C = 90 {}^{鈭�}{and} a = \sqrt{15}$ . Round measure of sides to the nearest tenth and angles to nearest degree.

Short Answer

Expert verified

The solution for triangle ABC is $b = 11.9, c = 12.5 and 鈭� A = 72 掳$ .

Step by step solution

Step 1. Write down the given parameters of triangle.

The given triangle ABC is shown below whose parameters are represented as $B = 18 {}^{鈭�}, C = 90 {}^{鈭�}{and} a = \sqrt{15}$ .

Step 2. Calculation.

In triangle ABC, $B = 18 {}^{鈭�}, C = 90 {}^{鈭�}{and} a = \sqrt{15}$ . Therefore, $鈭� A = 72 掳$ by angle sum property.

Now, trigonometric ratios,

$\begin{matrix} \cos B = \frac{a}{c} \\ \sin 18 掳 = \frac{\sqrt{15}}{c} \\ c = \sqrt{15} \csc (18 掳) \\ c = 12.5 \end{matrix}$

Now, in right triangle ABC by Pythagoras Theorem.

$\begin{matrix} c^{2} = a^{2} + b^{2} 鈥塯颈惫别蝉, \\ {(12.5)}^{2} = {(\sqrt{15})}^{2} + b^{2} \\ b^{2} = {(12.5)}^{2} 鈭� {(\sqrt{15})}^{2} \\ b = \sqrt{{(12.5)}^{2} 鈭� {(\sqrt{15})}^{2}} \\ b = 11.9 \end{matrix}$

Step 3. Conclusion.

Thesolution for triangle ABC, is $b = 11.9, c = 12.5 and 鈭� A = 72 掳$ .

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91影视

Solve triangle ABC using the given measurements if $B = 18 {}^{鈭�}, C = 90 {}^{鈭�}{and} a = \sqrt{15}$ . Round measure of sides to the nearest tenth and angles to nearest degree.

Short Answer

Step by step solution

Step 1. Write down the given parameters of triangle.

Step 2. Calculation.

Step 3. Conclusion.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

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91影视

Solve triangle ABC using the given measurements if B=18,鈭�C=90and鈭�a=15. Round measure of sides to the nearest tenth and angles to nearest degree.

Short Answer

Step by step solution

Step 1. Write down the given parameters of triangle.

Step 2. Calculation.

Step 3. Conclusion.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Geometry

Pure Maths

Applied Mathematics

Discrete Mathematics

Calculus

Theoretical and Mathematical Physics

Study anywhere. Anytime. Across all devices.

Solve triangle ABC using the given measurements if $B = 18 {}^{鈭�}, C = 90 {}^{鈭�}{and} a = \sqrt{15}$ . Round measure of sides to the nearest tenth and angles to nearest degree.