Plane and spherical trigonometry /
Kells, Lyman Morse.
Plane and spherical trigonometry / by Lyman M. Kells, Willis F. Kern and James R. Bland. - 3rd ed. - New York : McGraw-Hill, c1951. - xi, 290 p. : ill.
Includes index and answers: (p. 369-401) to exercises.
93013076
Trigonometry--Study and teaching (Higher).
Trigonometry--Problems, exercises, etc.
Plane trigonometry
Spherical trigonometry
Plane and spherical trigonometry / by Lyman M. Kells, Willis F. Kern and James R. Bland. - 3rd ed. - New York : McGraw-Hill, c1951. - xi, 290 p. : ill.
Includes index and answers: (p. 369-401) to exercises.
93013076
Trigonometry--Study and teaching (Higher).
Trigonometry--Problems, exercises, etc.
Plane trigonometry
Spherical trigonometry