Proving the Cosine of a Difference Identity

To prove the cosine of a difference identity, use the distance formula to find the lengths of the two versions of the dotted segment.

 

Laura Kinnel

 
Tipo de recurso
Actividad
Etiquetas
cosine  identity  trig 
Grupo destino (edad)
14 – 19+
Idioma
English
 
 
 
© 2025 International GeoGebra Institute