Question: For the following exercises, rewrite the sum as a product of two functions or the product as a sum of two functions. Give your answer

For the following exercises, rewrite the sum as a product of two functions or the product as a sum of two functions. Give your answer in terms of sines and cosines. Then evaluate the final answer numerically, rounded to four decimal places.

cos(44°) − cos(22°)

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Precalculus 1st Edition by Jay Abramson