Answer:
1. 25.74
2. 13.13
3. 9.31
4. 13.47
Explanation:
1. solution: C= (A^2 + B^2 - 2 ab cosy) = C= (10^2 + 19^2 - 2 * 10 * 19 cos (122 degrees) = 25.73654 rounded to the nearest 10 is 25.74
2. Solution: C= (A^2 + B^2 - 2 ab cosy) = C= (14^2 + 8^2 - 2 * 14 * 8 * cos (67 degrees) = 13.13302 rounded to the nearest 10 is 13.13
3. Solution: C=(A^2 + B^2 - 2 ab cosy) = C= (15^2 + 13^2 - 2 * 15 * 13 * cos (38 degrees) = 9.30998 rounded to the nearest 10 is 9.31
4. Solution: C=(A^2 + B^2 - 2 ab cosy) = C= (34^2 + 26^2 - 2 * 34 * 26 * cos (21 degrees) = 13.46959 rounded to the nearest 10 is 13.47
Hope this helped