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avatar+1449 

Help Me, please.

 Apr 1, 2018

Best Answer 

 #1
avatar+8724 
+3

We know angle B is 38°.

Side  a  is adjacent to angle B.

We know the hypotenuse is 15 ft.

 

And....

 

cos( angle )  =  adjacent / hypotenuse        And in this case...

 

cos 38°   =   a / 15

 

So the cosine function should be used.

 Apr 1, 2018
 #1
avatar+8724 
+3
Best Answer

We know angle B is 38°.

Side  a  is adjacent to angle B.

We know the hypotenuse is 15 ft.

 

And....

 

cos( angle )  =  adjacent / hypotenuse        And in this case...

 

cos 38°   =   a / 15

 

So the cosine function should be used.

hectictar Apr 1, 2018

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