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The Sine Quadrant
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The Sine Quadrant is a graphical mathematics tool that has been used for over a thousand years to perform a wide range of mathematical operations. Developed in 9th century Baghdad, the sine quadrant was used for determining celestial angles, telling time and the calendar, finding directions, and determining the apparent positions of any celestial object for any time.
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Wndsn Sine Quadrant (SqTM) qt90 White Acrylic
Sale price€48.00
Wndsn Sine Quadrant (SqTM) A6 Worksheet Pad Dot Grid
Sale price€5.50
The Wndsn Explorer's Notebook (Bundle of 3)
Sale priceFrom €15.00
Der Sinusquadrant (Auszug aus GQT5 DE)
Sale price€29.95
The Sine Quadrant (Excerpt from GQT5)
Sale price€29.95
Wndsn Eclipse Challenge Coin
Sale price€25.00
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