Graph one period of each function. y = 2 tan x/2

검증된 단계별 안내

Identify the given function: \(y = 2 \tan \left( \frac{x}{2} \right)\).

Recall the basic properties of the tangent function \(\tan x\): it has vertical asymptotes where its argument equals \(\frac{\pi}{2} + k\pi\), for any integer \(k\), and its period is \(\pi\).

Determine the period of the transformed function \(\tan \left( \frac{x}{2} \right)\) using the formula for the period of \(\tan(bx)\), which is \(\frac{\pi}{|b|}\). Here, \(b = \frac{1}{2}\), so the period is \(\pi \div \frac{1}{2} = 2\pi\).

Find the vertical asymptotes by solving \(\frac{x}{2} = \frac{\pi}{2} + k\pi\), which gives \(x = \pi + 2k\pi\). For one period, consider \(k=0\) to find asymptotes at \(x = \pi\) and \(x = -\pi\).

Plot the graph between the vertical asymptotes \(x = -\pi\) and \(x = \pi\), noting that the function is scaled vertically by a factor of 2, so the values of \(\tan \left( \frac{x}{2} \right)\) are multiplied by 2.

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주요 개념

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

Period of the Tangent Function

The standard tangent function, y = tan(x), has a period of π, meaning it repeats every π units. When the function is modified to y = tan(bx), the period changes to π/|b|. For y = 2 tan(x/2), the coefficient inside the tangent is 1/2, so the period is π divided by 1/2, which equals 2π.

Amplitude and Vertical Stretch

Although tangent functions do not have a maximum or minimum value, the coefficient outside the function, here 2, vertically stretches the graph. This means the output values are multiplied by 2, making the graph steeper and the values grow faster, but it does not affect the period or asymptotes.

Vertical Asymptotes of Tangent Functions

Tangent functions have vertical asymptotes where the function is undefined, occurring at points where the cosine in the denominator is zero. For y = tan(bx), asymptotes occur at x = (π/2 + kπ)/b, where k is any integer. For y = 2 tan(x/2), asymptotes are at x = π + 2kπ, guiding the graph's shape and domain restrictions.