In the text no mathematics higher than elementary algebra and geometry is introduced; in the foot-notes and in the Appendix an occasional trigonometric formula appears, for the benefit of the very considerable number of High school students who understand such expressions.
"An Introduction to Chemical Science"
R.P. Williams
These barometric levellings, though far from satisfactory as compared with trigonometric, are extremely interesting in the absence of the latter.
"Himalayan Journals V2."
J. D. Hooker
It reduced the enormous labor involved in trigonometric calculations.
"Our Legal Heritage, 4th Ed."
S. A. Reilly