Solve the equation over the interval [0, 2?).cos 3x + sin 3x = - Round to the nearest thousandth when necessary.

A. {0.235, 1.626, 4.738, 5.329}
B. ?
C. {0.190, 2.638, 4.099}
D. {1.632, 3.364, 4.982}

Answer: B

Mathematics

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Solve the problem.A cylindrical container with a volume of 3? ft3 is to be made from two different materials. The material used for the ends costs three times as much as the material for the side. What are the dimensions of the container that minimize the cost of the materials?

A. r =  ft; h =  ft
B. r =  ft; h = 4 ft
C. r =  ft; h = 4 ft
D. r =  ft; h = 3 ft