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Find the length of side a below using Law of Cosines. Give the exact value as an expression and an approximation to the nearest tenth.
![PLEASE HELP Find The Length Of Side A Below Using Law Of Cosines Give The Exact Value As An Expression And An Approximation To The Nearest Tenth class=](https://us-static.z-dn.net/files/d65/87966db132dd6522cf767a08dfa5a358.png)