SOLUTION: Can you please help me with this question? Find the measue of angel C in the triangle with the following dimensions a= 28, b= 35, c= 17 a. 52.16 b. 42.39 c. 28.65 d. 31.72 Tha

Algebra ->  Triangles -> SOLUTION: Can you please help me with this question? Find the measue of angel C in the triangle with the following dimensions a= 28, b= 35, c= 17 a. 52.16 b. 42.39 c. 28.65 d. 31.72 Tha      Log On


   

Question 142690This question is from textbook Precalculus
: Can you please help me with this question? Find the measue of angel C in the triangle with the following dimensions a= 28, b= 35, c= 17
a. 52.16
b. 42.39
c. 28.65
d. 31.72
Thank you This question is from textbook Precalculus

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find the measue of angel C in the triangle with the following dimensions a= 28, b= 35, c= 17
a. 52.16
b. 42.39
c. 28.65
d. 31.72
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Law of Cosines:
Cos(C) = (a^2+b^2-c^2)/2ab
Cos(C) = (28^2+35^2+17^2)/(2*28*35) = 0.8775510...
C = cos^-1(0.8775510..) = 28.65
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Cheers,
Stan H.