With the outbreak of World War II, a relatively large number of Americans had occasion to learn spherical trigonometry, inspiring the invention of this small cardboard chart. Called a "Spherical ...
THIS is a sequel to the large “Plane Trigonometry” by the same writer, and is naturally drawn up on the same plan. Its size is handy, and yet it contains a very large amount of matter. Much of this ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results