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Find b!  Please help!

 

 Sep 24, 2020
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Find b!

 

Hello Guest!

 

 \(b^2=a^2+c^2-2ac\cdot cos 115^{\circ}\)

\(b^2=(28^2+18^2-2\cdot 28\cdot 18\cdot cos \ 115^{\circ})m^2\\ b^2=1534m^2\)

 

\(b=39.166m\)

laugh  !

 Sep 24, 2020
edited by asinus  Sep 24, 2020

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