THIS is a good elementary text-book, founded on the work by M. E. Lagout (“Takimetry”), which we have already noticed (NATURE, vol. xvi. p. 226). The ground covered by the work before us is not quite ...

Google has been able to help with homework for quite some time now, while Lens features a step-by-step math solver. Google Search is now getting better at trigonometry, calculus, geometry, and physics ...