Find an Equation for the Graph $y = 2 \cos 3 x$

question 128

Multiple Choice

Find an equation for the graph.
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• A) \(y = 2 \cos 3 x\)
• B) \(y = 2 \cos \frac { 1 } { 2 } x\)
• C) \(y = 3 \cos \frac { 1 } { 3 } x\)
• D) \(y = 3 \cos 2 x\)

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Definitions:

Ethylbutane

A chemical compound that is a structural isomer of octane, with the formula C6H14.

Tetramethylbutane

An organic compound with a formula of C8H18, known as a highly branched alkane used in chemical research and applications.

Isooctane

An isomer of octane, widely used as a reference standard in the octane rating system for gasoline.

Dissolution

The process by which a solute forms a solution in a solvent, often thought of as the process of dissolving.