Use the sum-to-product formulas to select the sum or difference as a product.
A)
B)
D)

Question

Use the sum-to-product formulas to select the sum or difference as a product. ​  ​
A)​ 
B)​ 
D)​

Quizplus · Accepted Answer

The sum-to-product formulas are used to change the sum or difference of two trigonometric functions into a product of trigonometric functions. In this case, we want to select the sum or difference as a product. Looking at the answer choices, we see that option C has a "CEA" in the middle portion of the number while all the other options have different letters. This suggests that option C is the only one that involves the sum-to-product formulas as it requires the addition of two trigonometric functions to get the desired product. Therefore, the best choice is C.

Use the Sum-To-Product Formulas to Select the Sum or Difference