Trigonometric number

In mathematics, a trigonometric number is an irrational number produced by taking the sine or cosine of a rational multiple of a full circle, or equivalently, the sine or cosine of an angle which in radians is a rational multiple of π, or the sine or cosine of a rational number of degrees. One of the simplest examples is Ivan Niven gave proofs of theorems regarding these numbers. Li Zhou and Lubomir Markov recently improved and simplified Niven's proofs.

Trigonometric number

In mathematics, a trigonometric number is an irrational number produced by taking the sine or cosine of a rational multiple of a full circle, or equivalently, the sine or cosine of an angle which in radians is a rational multiple of π, or the sine or cosine of a rational number of degrees. One of the simplest examples is Ivan Niven gave proofs of theorems regarding these numbers. Li Zhou and Lubomir Markov recently improved and simplified Niven's proofs.