+0  
 
0
117
3
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Link to quesiton

https://snipboard.io/9u7vMN.jpg

 

 

 May 13, 2021
edited by Melody  May 13, 2021
edited by Melody  May 13, 2021
edited by Melody  May 13, 2021
 #1
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0

cos(α + β) = 0.403183023    or    152/377

 May 13, 2021
 #2
avatar+114535 
0

Guest:

Your answer is useless, it will not help anyone learn anything.

Melody  May 13, 2021
 #3
avatar+114535 
+1

Hint:

Use the expansion for  cos(a+b)

If you do not know what that is, look it up.

 

Also, draw 2 right angled trianges.  one with angle alpha and one with an angle Beta

 

Put the two sides (ratio) on that you know and use Pythagoras's theorem to find the third.

 May 13, 2021
edited by Melody  May 13, 2021

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