Question

Anyone to help me answer this question am giving the brainliest

Answer 1

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

As we know,

• $\boxed{\sin(a + b) = \sin(a) \cos(b) + \cos(a) \sin(b) }$

and

• $\boxed{\sin(a - b) = \sin(a) \cos(b) - \cos(a \sin(b) ) }$

now, let's add them as shown ~

• $\boxed{\sin(a + b) + \sin(a - b)}$

• $\boxed{ \sin(a) \cos(b) + \cos(a) \sin(b) + \sin(a) \cos(b) - \cos(a) \sin(b) }$

• $\boxed{2 \sin(a) \cos(b) }$