Question: Express the product as a sum containing only sines or cosines. sin (20) sin (50) O A. ~[cos (30) - cos (70)] 1 O B.

![sin (20) sin (50) O A. ~[cos (30) - cos (70)] 1](https://s3.amazonaws.com/si.experts.images/answers/2024/06/666dfb3f055da_775666dfb3f01375.jpg)
Express the product as a sum containing only sines or cosines. sin (20) sin (50) O A. ~[cos (30) - cos (70)] 1 O B. [- cos (30) - cos (70)] O C. sin 2 (1002 ) O D. ~[cos (70) - sin (30)]
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