Learn how to solve trigonometric equations in Higher Maths involving multiple or compound angles and the wave function in degrees or radians.

Learn how to solve trigonometric equations in Higher Maths involving multiple or compound angles and the wave function in degrees or radians.

In this paper we study a type of trigonometric extremal problem which originates in the work of Arne Beurling in the late 1930s and concerns approximations to the function sgn (x). The extremal ...