!!! PLEASE HELP ASAP !!!! just fill in the few boxes (serious answers only or i’ll report)

also if you zoom in on the picture, it’ll become clear

PLEASE HELP ASAP just fill in the few boxes serious answers only or ill report also if you zoom in on the picture itll become clear class=

Respuesta :

Answer:

See explanation

Step-by-step explanation:

sin(α + β) = sin α cos β + sin β cos α

sin(α - β) = sin α cos β - sin β cos α

[tex]\frac{1}{2}[/tex][ sin(α + β) + sin(α - β)] = [tex]\frac{1}{2}[/tex][sin α cos β + sin β cos α + sin α cos β - sin β cos α]

                               = [tex]\frac{1}{2}[/tex][2 sinα cos β]

                               = sin α cos β = [tex]\frac{1}{2}[/tex][ sin(α + β) + sin(α - β)]