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Proving a set is orthogonal

  • Thread starter ainster31
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  • #1
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Homework Statement



ZI9L53P.png


Homework Equations





The Attempt at a Solution



zPYzL5K.png


I'm not sure how to prove that it is zero. I don't see what I can do after the second last step.
 

Answers and Replies

  • #2
arildno
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What does sin(integer*pi) equal?
 
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  • #3
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What does sin(integer*pi) equal?
It's equal to zero.

Wow. My trigonometry is terrible.
 

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