This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American On Monday, the Onion reported that the ...

Trigonometric identities are powerful tools for simplifying complex equations in math and science. Three core groups—reciprocal, quotient, and Pythagorean—form the foundation. Effective strategies ...

Mathematics students have cause to celebrate. A University of New South Wales academic, Dr Norman Wildberger, has rewritten the arcane rules of trigonometry and eliminated sines, cosines and tangents ...

A collection of three worksheets on the following topics: Unit Circle-Trigonometric Ratios: on using the unit circle to find the sign and the value of the trigonometric ratios of given angles ...

A worksheet on the trigonometric identities tanx=sinx/cosx, cotx=cosx/sinx and sin^2x+cos^2x=1. The exercises require to use these identities to evaluate expressions and trigonometric ratios and prove ...