I have the question "An oscillator undergoes SHM (simple harmonic motion) with a frequency of 7.2S^-1. If the maximum amplitude is 1.0m, find the velocity at half the maximum amplitude."
Here is my attempt. Is this correct ?

I have the question "An oscillator undergoes SHM (simple harmonic motion) with a frequency of 7.2S^-1. If the maximum amplitude is 1.0m, find the velocity at half the maximum amplitude."
Here is my attempt. Is this correct ?

Yes your method is correct but you should get $39.178066...$ if you avoid premature rounding off