SOLUTION: I have to find the exact value for this trigonometric expression: sec(30)- cos(7/4)= ???

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Question 1029429: I have to find the exact value for this trigonometric expression:
sec(30)- cos(7/4)= ???
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
Is it 30 degrees and 7/4 radians?