(1) Elements of Plane and Spherical Trigonometry (2) Homogeneous Coordinates for Use in Colleges and Schools (3) A Geometry for Schools (4) Analytic Geometry

Abstract

(1) THIS volume contains a fairly through treatment of the numerical aspects of plane and spherical trigonometry. In addition to this, a certain amount of attention is directed to elementary identity work, and some indication is given of the higher analytical developments of the subject, based on Demoivre's theorem, in the concluding chapter of the first part of the book. It is unfortunate that the symbol e^iθ is regarded as equivalent to exp(iθ). This is the source of much error in the minds of students, and from the earliest stage it is most desirable to emphasise the distinction between the two forms. With this exception, the mode of presentation is excellent. There are numerous exercises and problems, but at present no answers are given. This is a serious omission, and it should be rectified in a new edition. Five-figure tables of logarithms and trigonometric functions are appended to the book.

(1) Elements of Plane and Spherical Trigonometry.

By Prof. D. A. Rothrock. Pp. xi+147+xiv+99. (New York: The Macmillan Co.; London: Macmillan and Co., Ltd., 1910.) Price 6s. net.

(2) Homogeneous Coordinates for Use in Colleges and Schools.

By Dr. W. P. Milne. Pp. xii+164. (London: E. Arnold, 1910.) Price 5s. net.

(3) A Geometry for Schools.

By F. W. Sanderson G. W. Brewster. Pp. x+336. (Cambridge: University Press, 1910). Price 3s.

(4) Analytic Geometry.

By Prof. N. C. Riggs. Pp. xi + 294. (New York: The Macmillan Co.; London: Macmillan and Co., Ltd., 1910.) Price 7s. net.