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find D

 Nov 25, 2020
 #1
avatar+116126 
+2

We  know  the adjacent side to D  =  11   and the  hypotenuse of this right triangle   = 15

 

The  trig function that relates  these   is the  cosine

 

So

 

cos D  = (11/15)       take  the arccos  (cosine inverse )  to find D

 

arccos (11/15)  = D  ≈  42.8° 

 

 

cool cool cool

 Nov 25, 2020
 #2
avatar+57 
+2

thank you😎👍

mav002  Nov 25, 2020
 #3
avatar+116126 
+1

Ur welcome     !!!!

 

cool cool cool

CPhill  Nov 25, 2020

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