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Suppose cos Q = 0.4 in the diagram below. What is QR?

 Oct 9, 2020
 #1
avatar+27725 
+1

Cos Q ?   Q is a right angle....cos = 0

 

If cos R = 0.4

   then   cos R = adj/hyp = QR/9

                 .4 = QR / 9    then QR = 3.6 units

 Oct 9, 2020
 #2
avatar+936 
0

Oh wait I used the wrong diagram 

qwertyzz  Oct 9, 2020
 #3
avatar+27725 
+1

.4 = 12/QR  

 Oct 9, 2020

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