Question: In Exercises 1-4, solve the equation. 1. sin 2x sin x = 0 2. sin 2x sin x = cos x 3. cos 2x

In Exercises 1-4, solve the equation.
1. sin 2x − sin x = 0
2. sin 2x sin x = cos x
3. cos 2x − cos x = 0
4. cos 2x + sin x = 0

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