Elementary lessons in electricity and magnetism (1906)
Thompson, Silvanus P. (Silvanus Phillips), 1851-1916, Schwetzky, Otto H. L. [from old catalog] · Chicago, Thompson & Thomas · leaf 127
^functions of them called **sines,*cosines, ^tangetits, etc. For readersnot Accustomed to these we will briefly ex-plain the geometrical nature of these^^ftmetions. Suppose we draw (Fig. 61)our circle as before round centre C, andthen dpp down a plurfib-line P M, onto the line CO; we will, instead… … Fig. 61. but as the angleget longer andThe ratio between the length of this line andthe radius of the circle is called the *j/;?<?of the angle, and if the radius is I thelength of P M will be the value of the sine.It can never be greater than i, though itmay have all values between i and - i.The…
Electricity · Magnetism
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
