Question

1. one cycle of a sine wave always has

a one positive and one negative alternation

b two positive alternations in succession

c one positive and one negative cycle

d two negative cycles in succession

Explanation:

A sine - wave is a periodic function. One complete cycle of a sine wave consists of the wave going above the x - axis (positive alternation) and then below the x - axis (negative alternation).

Answer:

A. one positive and one negative alternation