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I'm assuming that the correct answer to this problem was a, but I'm not sure why. How do I know when to use sin and when to use cosine when writing the equation for simple harmonic motion? I have attached a picture of the question by the way.

Thank you so much for your help!

Im assuming that the correct answer to this problem was a but Im not sure why How do I know when to use sin and when to use cosine when writing the equation for class=

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cynthiatershner
Always remember SOHCAHTOA!!
Sin- Opposite over Hypotenuse
Cos- Adjacent over Hypotenuse
Tan- Opposite over Adjacent

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