Find the third harmonic (Sound Physics)

AI Thread Summary
The discussion focuses on calculating the amplitudes of the second and third harmonics of a 300 Hz square wave. The second harmonic's amplitude is correctly calculated as 0.3183 A using the formula An = 2/(pi*n). For the third harmonic, the initial calculation of 0.2122 A was accurate but required proper rounding to reflect the correct value. The user confirms the calculations are correct after clarification on rounding. Accurate harmonic amplitude calculations are essential for understanding sound physics.
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Question: The frequencies of the first three harmonics of a 300 Hz square wave are 300 Hz, 900 Hz, and 1500 Hz. If the amplitude of the fundamental is 1.00 A, then the amplitudes of the second harmonic is _____ A, and the amplitude of the third harmonic is _____ A.

I found the answer to the second harmonic, by using the formula: An = 2/(pi*n). I did 2/(pi*2) and got 0.3183.

For the third harmonic I tried doing 2/(pi*3), which got me 0.2122, but that does not seem to be the answer.
 
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Update: The answer was correct, just not rounded properly.
Thanks.
 

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