Respuesta :

[tex]sin(\alpha+\beta)=sin\alpha cos\beta+cos\alpha sin\beta\\\\sin22^ocos18^o+cos22^osin18^o=sin(22^o+18^o)=sin40^o\approx0.6428[/tex]

Answer:

find the exact value using trigonometric identities 0.6427876

Step-by-step explanation: