Angle Formulas in Trigonometry: Definition, Representaion, Questions & More Check definition and formulas for central angle, double angle and multiple angles.

I'm talking about trigonometry, of course: that bastion of angles and triangles that is essential to calculating velocity, momentum, and much more.

The form you should use may be given to you in a question, but if not, any one will do. If in doubt, \(k\cos (x - \alpha )\) usually works. These worked examples show the processes you'll need to go ...