Find the Amplitude, Period, and Phase Shift of the Function $y = 2 \cos \left( \frac { 1 } { 4 } x + \frac { 1 } { 2 } \pi \right)$

question 45

Essay

Find the amplitude, period, and phase shift of the function $y = 2 \cos \left( \frac { 1 } { 4 } x + \frac { 1 } { 2 } \pi \right)$ , and sketch its graph for one complete period.

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Definitions:

Survey

A method of gathering information from a sample of individuals designed to represent a larger population, often used in research to collect data on attitudes, opinions, behaviors or characteristics.

Preferred Brand

A brand that consumers favor over comparable brands due to factors like quality, performance, price, or emotional connection.

Significance Level

This represents the threshold below which the p-value of a test statistic must fall for results to be considered statistically significant, thus leading to the rejection of the null hypothesis.

Supermarkets

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