Determine whether the Law of Sines or the Law of Cosines

1. Determine whether the Law of Sines or the Law of Cosines can be used to find another measure of the triangle.

 a = 12, b = 14, c= 9

Law of Sines   Law of Cosines

Then solve the triangle. (Round your answers to two decimal places.)

A = o

B = o

C = O

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2. [-71 Points] DETAILS

 In the triangle below, x = 9. Use the Law of Cosines to solve the triangle. 18 cm 12 cm B x cm ? A = o B = o C= O

3. Find the area of the triangle having the indicated angle and sides. (Round your answer to one decimal place.) B = 128° a = 98, c = 37

4. [-/1 Points] DETAILS MY NOTES

Use the Law of Sines to solve the triangle. (Round your answers to two decimal places.) B = 46°, C = 109°, c = 25 A = O a = b =

 5. [-/1 Points] DETAILS MY NOTES

Because of prevailing winds, a tree grew so that it was leaning 7º from the vertical. At a point d = 41 meters from the tree, the angle of elevation to the top of the trees is a = 25° (see figure). Find the height h of the tree. (Round your answer to one decimal place.) h = m bº d m