Find the Period and Amplitude $\frac { 1 } { 7 }$

question 23

Multiple Choice

Find the period and amplitude. ​
Y = 7 sin 40x
​

• A)Period: π;Amplitude: -7
• B)Period: π;Amplitude: \(\frac { 1 } { 7 }\)
• C)Period: \(\frac { \pi } { 20 }\) ;Amplitude: \(- \frac { 1 } { 7 }\)
• D)Period: 2π;Amplitude: 1
• E)Period: \(\frac { \pi } { 20 }\) ;Amplitude: 7

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