<p>I remember back in precalc there were a few exceptions when trying to apply the law of cosines, to a given set of angles and side lengths, as in some circumstances the triangle wouldn’t exist, or the true angle when solving for capital C (or theta) would be the compliment of your calculator result, blah blah blah.</p>
<p>I can’t seem to find this on google. Can someone enlighten me or point me to a site that will?</p>