Prove that: \[ \sin (x+y) \sin (x-y)+\sin (y+z) \sin (y-z)+\sin (z+x) \sin (z-x)=0 \]

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PW Solutions
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Published on ● Video Link: https://www.youtube.com/watch?v=LVXWc0qpVUc


Game:
SiN (1998)
Duration: 2:55
1 views
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Prove that:
\[
\sin (x+y) \sin (x-y)+\sin (y+z) \sin (y-z)+\sin (z+x) \sin (z-x)=0
\]
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