Category:4 Sine Pi over 10 by Cosine Pi over 5

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This category contains pages concerning $4 \sin \dfrac \pi {10} \cos \dfrac \pi 5$:


$4 \sin \dfrac \pi {10} \cos \dfrac \pi 5 = 1$

Pages in category "4 Sine Pi over 10 by Cosine Pi over 5"

The following 4 pages are in this category, out of 4 total.