SOLUTION: using the law of cosines, solve for zy http://prntscr.com/rzxrcz

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Question 1156149: using the law of cosines, solve for zy
http://prntscr.com/rzxrcz
Found 3 solutions by Alan3354, josgarithmetic, Edwin McCravy:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
using the law of cosines, solve for zy
http://prntscr.com/rzxrcz
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Good idea.
c%5E2+=+a%5E2+%2B+b%5E2+-+2%2Aa%2Ab%2Acos%28C%29 where C is the angle between sides a & b.

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
9.8%5E2%2B21.2%5E2-2%289.8%29%2821.2%29cos%28108%29=%28ZY%29%5E2
Simplify and solve for ZY.

Answer by Edwin McCravy(20056) About Me  (Show Source):