SOLUTION: How can we find the length of one side of a triangle when two sides and an angle is given using Sine and cosine?please give an example.
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Question 455002: How can we find the length of one side of a triangle when two sides and an angle is given using Sine and cosine?please give an example. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! How can we find the length of one side of a triangle when two sides and an angle is given using Sine and cosine? please give an example.
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Use Law of Cosines:
Example
If a = 3 and b = 4 and angle C = 30 degrees,
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c^2 = a^2 + b^2-2ab*cos(C)
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c^2 = 3^2+4^2-2*12*(sqrt(3)/2)
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c^2 = 25-12*sqrt(3)
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c = sqrt[4.215..]
c = 2.053
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Cheers,
Stan H.
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