×

×

# (a) For the triangle in the accompanying figure, use trigonometry to show that and then ISBN: 9780470432051 396

## Solution for problem 29 Chapter 2

Elementary Linear Algebra: Applications Version | 10th Edition

• Textbook Solutions
• 2901 Step-by-step solutions solved by professors and subject experts
• Get 24/7 help from StudySoup virtual teaching assistants Elementary Linear Algebra: Applications Version | 10th Edition

4 5 1 390 Reviews
24
1
Problem 29

(a) For the triangle in the accompanying figure, use trigonometry to show that and then apply Cramer's rule to show that (b) Use Cramer's rule to obtain similar formulas for and . Figure Ex-29

Step-by-Step Solution:
Step 1 of 3

M303 Section 3.2 Notes- Properties of Determinants 10-19-16  Key to “efficient” computing of determinants is understanding how row operations affect them  Theorem 3- Let be × : o If obtained from by row replacement, then det = det o If obtained by row swapping, then det = −det 1 o If obtained by nonzero scaling, then det = det →det = det − − −  Ex. |5 2 3| − − − − − −  2→ = 2 | 5 2 3 | − − −  Think of like factoring out 2 −8 6 8  Ex. Compute det = |3 −9 5 10 |using row reduction. −3 0 1 −2 1 −4 0 6 1 −4 3 4 1 3 −9 5 10 1→ 2=12| −3 0 1 −2 | 1 −4 0 6 1 −4 3 4 2 −23 1 0 3 −4 −2 { 3 +33 =12 | | 4→ 4 1 0 −12 10 10 0 0 −3 2 1 −4 3 4 → + 4 = 2| 0 3 −4 −2 | 3 3 2 0 0 −6 2 0 0 −3 2

Step 2 of 3

Step 3 of 3

##### ISBN: 9780470432051

Since the solution to 29 from 2 chapter was answered, more than 269 students have viewed the full step-by-step answer. The full step-by-step solution to problem: 29 from chapter: 2 was answered by , our top Math solution expert on 03/13/18, 08:29PM. This textbook survival guide was created for the textbook: Elementary Linear Algebra: Applications Version, edition: 10. The answer to “(a) For the triangle in the accompanying figure, use trigonometry to show that and then apply Cramer's rule to show that (b) Use Cramer's rule to obtain similar formulas for and . Figure Ex-29” is broken down into a number of easy to follow steps, and 34 words. This full solution covers the following key subjects: . This expansive textbook survival guide covers 83 chapters, and 2248 solutions. Elementary Linear Algebra: Applications Version was written by and is associated to the ISBN: 9780470432051.

Unlock Textbook Solution