Solve the equation. (Enter your answers as a comma-separated list. Use n as an integer constant. Enter your response in radians.) 7 cos x + 4 = -cos x
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Step 1:** Add $\cos(x)$ to both sides of the equation: $$7\cos(x) + 4 + \cos(x) = -\cos(x) + \cos(x)$$ $$8\cos(x) + 4 = 0$$ ** Show more…
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