trigonometric formulas
preferred label: فرمول‌های مثلثاتی @fa
type: Concept
narrower: half-angle formulas

angle
preferred label: زاویه @fa
type: Concept
related: half-angle formulas

half-angle formulas
related: angle
related: trigonometric axsis
broader: trigonometric formulas
preferred label: فرمول‌های نیم‌زاویه @fa
type: Concept

trigonometric axsis
preferred label: محورهای مثلثاتی @fa
type: Concept
related: half-angle formulas