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avatar+979 

Can someone answer this and show how they answer it so I can learn how to do it in the fututre 

 Oct 14, 2020
 #1
avatar+28026 
+1

In a right triangle   cos c = adjacent leg  /  hypotenuse

 

cos c =          9 sqrt130 / 130   =  AC / sqrt(130)

                      AC =   sqrt130   *  9 sqrt(130)/130  = 9

 

 

AC = 9

 Oct 14, 2020
 #2
avatar+979 
+1

Thanks!

qwertyzz  Oct 14, 2020

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