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» » » » Post: Re: Law of cosine/sine

Print at May 22, 2013 3:50:50 PM

Posted by pskinner at Sep 2, 2010 6:35:18 PM

Re: Law of cosine/sine

Find the requested information using the law of cosines and/or the law of sines. Round to three decimal places.

A triangle has sides a = 4 and b = 2 and angle C = 50°. Find the length of side c.

I tried using Law of cosine:
C^2=4^2+2^2-2(cos50)8
Am not sure if I was doing it right. Thanks for your help.

Yes, you are doing it right! Compute the right side, then take the square root.
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Principal Skinner