Find each measurement indicated Round your answers to the ne

Find each measurement indicated. Round your answers to the near east tenth. 1) Find AB 2) Find BC C) Find BC 4) Find BC

Solution

1) Find AB :

Use cosine law:

AB^2 = AC^2 +BC^2 - 2AC*BCcos41

AB^2 = 13^2 +29^2 -2*13*29cos41

AB = 16.59

2) Find BC

Apply cosine rule: BC^2 = AB^2 +AC^2 - 2AB*ACcos123

=30^2 +21^2 -2*30*21cos123

BC =45.02