Find the amplitude of a sinusoid given frequency and time after zero-crossing

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Homework Statement
What is the elongation of a sine wave if the amplitude is 12cm and the frequency is 12Hz after 0.04 s after the zero crossing
Relevant Equations
s=smaxsin (2π f t)
2π f t = 6,28  12  0,04 = 3,0144
 
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Welcome to PF. :smile:

What is the sine of 3.01 radians? How does that help you to get to your solution?
 
berkeman said:
Welcome to PF. :smile:

What is the sine of 3.01 radians? How does that help you to get to your solution?
thanks I have it now :)
 
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