Determine the Period and Amplitude of the Following Function $y=4 \cos \left(\frac{3 x}{4}+\frac{\pi}{4}\right)$

question 12

Multiple Choice

Determine the period and amplitude of the following function.
$y=4 \cos \left(\frac{3 x}{4}+\frac{\pi}{4}\right)$

• A) period: \(2 \pi\), amplitude : 2
• B) period: \(10 \pi\), amplitude : 2
• C) period: \(5 \pi\), amplitude : 4
• D) period : \(\frac { 8 \pi } { 3 } ;\) amplitude \(: 4\)
• E) period: \(3 \pi\), amplitude : 4

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