trigonometric function
type: Concept
preferred label: تابع مثلثاتی @fa
related: linear vibration theory

characteristic equation
type: Concept
preferred label: معادله مشخصه @fa
related: linear vibration theory

differential equation
type: Concept
preferred label: معادله دیفرانسیل @fa
related: linear vibration theory

linear vibration theory
type: Concept
broader: classical mechanics
preferred label: نظریه ارتعاش خطی @fa
related: trigonometric function
related: degree of freedom
related: characteristic equation
related: differential equation

classical mechanics
type: Concept
narrower: linear vibration theory
preferred label: مکانیک کلاسیک @fa

degree of freedom
type: Concept
preferred label: درجه آزادی @fa
related: linear vibration theory