If prove that either or tried for an hour trying to prove this with the law of cosines but that didn't seem to go anywhere a,b,c are the sides of any triangle are the corresponding angles
Last edited by bigwave; Dec 17th 2009 at 04:32 PM. Reason: more info
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Originally Posted by bigwave If prove that either or tried for an hour trying to prove this with the law of cosines but that didn't seem to go anywhere a,b,c are the sides of any triangle are the corresponding angles Sine rule: . Deduce that , hence . If two angles have the same sine then they are either equal or supplementary.
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