SOLUTION: Use the Law of Cosines to find the indicated value. Roud your answer to the nearest hundredth. I am stuck on this part of Algebra are my answers right. This so confusing please hel

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Question 248734: Use the Law of Cosines to find the indicated value. Roud your answer to the nearest hundredth. I am stuck on this part of Algebra are my answers right. This so confusing please help

1). Find the third side of a triangle with sides of 35ft and 26ft and an included angle of 16. Answer cos = 12.31
2). Find the third side of a triangle with sides of 19m and 16m an and included angle of 43. Answer cos =0.555113302
3). Find the third side of a triangle with sides of 120cm and 100cm and an included angle of 47. Answer 156.207

Answer by Alan3354(69443) About Me  (Show Source):
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Use the Law of Cosines to find the indicated value. Roud your answer to the nearest hundredth. I am stuck on this part of Algebra are my answers right. This so confusing please help
1). Find the third side of a triangle with sides of 35ft and 26ft and an included angle of 16. Answer cos = 12.31
c%5E2+=+a%5E2+%2B+b%5E2+-+2abcos%2816%29
c%5E2+=+1225+%2B+676+-+2%2A35%2A26%2A0.9612617
c%5E2+=+151.5037
c =~ 12.31
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2). Find the third side of a triangle with sides of 19m and 16m an and included angle of 43. Answer cos =0.555113302
Same as above, c =~ 13.1277
I don't know what you mean by cos = 0.555...
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3). Find the third side of a triangle with sides of 120cm and 100cm and an included angle of 47. Answer 156.207
I get 89.62 ???
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