Graph one period of each function. y = 3 sin 2x

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Identify the general form of the sine function: \(y = A \sin(Bx)\), where \(A\) is the amplitude and \(B\) affects the period.

Determine the amplitude \(A\) by looking at the coefficient in front of the sine function. Here, \(A = 3\), which means the graph will oscillate between \(3\) and \(-3\).

Calculate the period of the function using the formula \(\text{Period} = \frac{2\pi}{B}\). Since \(B = 2\), the period is \(\frac{2\pi}{2} = \pi\).

Set up the x-values for one period starting from \(0\) to \(\pi\). This means you will graph the function from \(x=0\) to \(x=\pi\).

Plot key points within one period: at \(x=0\), \(x=\frac{\pi}{4}\), \(x=\frac{\pi}{2}\), \(x=\frac{3\pi}{4}\), and \(x=\pi\), using the function \(y = 3 \sin(2x)\), then connect these points smoothly to form one complete sine wave.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Amplitude of a Sine Function

The amplitude is the maximum value the sine function reaches from its midline, determined by the coefficient before the sine term. For y = 3 sin 2x, the amplitude is 3, meaning the graph oscillates between -3 and 3.

Period of a Sine Function

The period is the length of one complete cycle of the sine wave. It is calculated as (2π) divided by the coefficient of x inside the sine function. For y = 3 sin 2x, the period is π, so the graph completes one full wave from 0 to π.

Graphing One Period of a Sine Function

To graph one period, plot points starting at x = 0 and ending at x equal to the period, marking key points where the sine function reaches 0, maximum, and minimum values. For y = 3 sin 2x, plot from 0 to π, noting the amplitude and zero crossings.