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Simplify the following 1. cos(-3x) cos(-x) - cos(-3x) sin(-x) 2. 2 cos(-)-1 5 3. sin12- sin8

Simplify the following 1. cos(?3x) cos(-x) ? cos (6 ? 3x) sin(-x) cos (5 ? ) - 1 2. 2 cos 3. sin12? ? sin8?

Simplify the following 1. cos(-3x) cos(-x) - cos(-3x) sin(-x) 2. 2 cos(-)-1 5 3. sin12- sin8

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