SOLUTION: Find each exact value of cos(x-y) if cos(x)=(5)/(12) and cos(y)=(11)/(12).

SOLUTION: Find each exact value of cos(x-y) if cos(x)=(5)/(12) and cos(y)=(11)/(12).

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Question 366648: Find each exact value of cos(x-y) if cos(x)=(5)/(12) and cos(y)=(11)/(12).
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Since , this means that

Also, because , this means that

Now use the identity to get:

So when and
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