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Engineering, 04.09.2020 21:01 jngonzo1226

Sin^2(a/2)+sin^2(b/2)-sin^2(c/2)=1- 2cos(a/2)cos(b/2)sin(c/2)

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Sin^2(a/2)+sin^2(b/2)-sin^2(c/2)=1- 2cos(a/2)cos(b/2)sin(c/2)...
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