SOLUTION: How do you solve cos(45degrees + 30degrees) using trigonomic identities?

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Question 254156: How do you solve cos(45degrees + 30degrees) using trigonomic identities?
Answer by drk(1908)   (Show Source): You can put this solution on YOUR website!
The question was:
(i)
We have the following identity:

So, (i) becomes
(ii)
or

which is

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