Angle (argument of a function): \(\alpha\)

Trigonometric functions: \(\sin \alpha,\) \(\cos \alpha,\) \(\tan \alpha,\) \(\cot \alpha,\) \(\sec \alpha,\) \(\csc \alpha\)

- Exact values of trigonometric functions for common angles: \(0^\circ,\) \(30^\circ,\) \(45^\circ,\) \(60^\circ,\) \(90^\circ,\) \(120^\circ,\) \(180^\circ,\) \(270^\circ,\) and \(360^\circ\)
- Exact values of trigonometric functions for the angles \(15^\circ,\) \(18^\circ,\) \(36^\circ,\) \(54^\circ,\) \(72^\circ,\) and \(75^\circ\)