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

question 79

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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