SOLUTION: Express as a trigonometric function of one angle cos48degrees cos23degrees + sin48degrees sin23degrees

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Question 1130891: Express as a trigonometric function of one angle
cos48degrees cos23degrees + sin48degrees sin23degrees
Answer by ikleyn(52817) About Me  (Show Source):
You can put this solution on YOUR website!
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= cos(48°-23°) = cos(25°).