They used the Law of Sines in their proof, avoiding circular reasoning, which has long been considered unworkable due to the ...

There are some trigonometric identities which you must remember in order to simplify trigonometric expressions when required. When you are asked to prove something, ignore the right hand side of ...

Solve \(\sqrt 3 \cos x + \sin x = \sqrt 2\), for \(0 \le x \le 2\pi\). First of all we need to put \(\sqrt 3 \cos x + \sin x\) into the form \(k\cos (x - \alpha ...

Stuart Anderson, a professor emeritus of mathematics at Texas A&M University–Commerce, told Scientific American, “A lot of the basic trig ‘identities’ are nothing more than Pythagoras ...