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i_speak_softly (
i_speak_softly
) wrote
in
lorentzian
2013-11-23 02:46 am (UTC)
[Written]
sin (x) - sin (y) = 2cos [(x + y) / 2] sin [(x - y) / 2]
Σ
2
[It's traditional for two people to begin a conversation by introducing themselves.]
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[Written]
Σ2
[It's traditional for two people to begin a conversation by introducing themselves.]