Lucinda is trying to show her brother a new magic trick with a deck of cards. If she asks her brother to draw a card from the de
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You need the Law of Sines for this. In our case we have the measure of angle B and side b, we have the measure of angle A and are looking for side a, or x. Setting up the Law using our info, we have 
. We will solve for x by multiplying both sides by sin(42): 
, first choice above.
