OpenStax, Precalculus 2e §7.4 Sum-to-Product and Product-to-Sum Formulas · Exercise 41 · Trigonometry · Compound & multiple angles

Sum-to-Product and Product-to-Sum Formulas · Exercise 41

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.

$cos (4 4^{\circ}) - cos (2 2^{\circ})$

~8 minWritten answer · compare with the solution

OpenStax, Precalculus 2e · §7.4 Sum-to-Product and Product-to-Sum Formulas · Exercise 41

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