Question: 1 [cos(x + y) + cos(x y)] = 2
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1 [cos(x + y) + cos(x y)] = 2
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![1 [cos(x + y) + cos(x y)] = 2](https://s3.amazonaws.com/si.experts.images/answers/2024/06/66699d32f1834_55466699d32da7b0.jpg)

1 [cos(x + y) + cos(x y)] = 2
There are 3 Steps involved in it
Get step-by-step solutions from verified subject matter experts