TrigonometryMediumSum, Difference, and Multiple-Angle Formulas ShareSum, Difference, and Multiple-Angle Formulas · Medium problemExpress sin4x\sin^4 xsin4x in terms of first powers of cosine.A3−4cos2x+cos4x8\dfrac{3-4\cos 2x+\cos 4x}{8}83−4cos2x+cos4xB3−4cos2x+cos4x9\dfrac{3-4\cos 2x+\cos 4x}{9}93−4cos2x+cos4xC83−4cos2x+cos4x\dfrac{8}{3-4\cos 2x+\cos 4x}3−4cos2x+cos4x8D6−4cos2x+cos4x8\dfrac{6-4\cos 2x+\cos 4x}{8}86−4cos2x+cos4xCheck Show answer Walk through it step by step Practice more like this Review this concept