Expansion of any term
Expansion of any term is not necessary; proper recognition of the form of the expression leads to the proper result.
1. 4 sin 2x cos 2x
2. cos^2 4x - sin^2 4x
3. 2 -4 cos^2 2x
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Why is it necessary to wear clean, protective clothing when caring for a patient? Why should hair be kept clean and out of the way when caring for patients?
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