Inside Out Library
Perspective : the old and the new method (1921)
Percival, A. S. (Archibald Stanley), 1862- · London ; New York [etc.] : Longmans, Green and Co. · leaf 46
Cosine Tangent Cotangeiit Secant Cosecant 10 •1736 •9848 •1763 5-6713 1-0154 5^7588 80° 20° •3420 ■9397 •364 2-7475 1-0642 2-9238 70° 30° ■5 •8660 •5774 1-7321 1-1547 2-0 60° 40° •6428 •7660 •8391 1-1918 1^3054 1-5557 50° 45° •7071 •7071 1^0 1-0 r4142 1-4142 45° Cosine Sine Cotangent Tangent…Perspective
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