Which of the following is the correct identity for cos(3x)\cos(3x)cos(3x) in terms of cos(x)\cos(x)cos(x)?
4cos3(x)−3cos(x)4\cos^3(x) - 3\cos(x)4cos3(x)−3cos(x)
3cos(x)−4cos3(x)3\cos(x) - 4\cos^3(x)3cos(x)−4cos3(x)
4cos3(x)+3cos(x)4\cos^3(x) + 3\cos(x)4cos3(x)+3cos(x)
2cos3(x)−cos(x)2\cos^3(x) - \cos(x)2cos3(x)−cos(x)