​Determine the Period and Amplitude of the Following Function​ $$y = 5 \cos \left( \frac { 5 x } { 7 } + \frac { 1 } { 3 } \right)$$

question 17

Multiple Choice

​Determine the period and amplitude of the following function​ $$y = 5 \cos \left( \frac { 5 x } { 7 } + \frac { 1 } { 3 } \right)$$ ​

• A)​Period: 16 \(\pi\) ;Amplitude: 10
• B)​Period: \(\pi\) ;Amplitude: 5
• C)​Period: 5 \(\pi\) ;Amplitude: 6
• D)​Period: \(\frac { \pi } { 2 }\) ;Amplitude: 5
• E)​Period: 8 \(\pi\) ;Amplitude: 4

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