Question Video: Proving the Addition Formula for Sine from its

Using the relation sin (𝛼 − 𝛽) = sin 𝛼 cos 𝛽 − cos 𝛼 sin 𝛽, find an expression for sin (𝛼 + 𝛽).
Using the relation sin (𝛼 − 𝛽) = sin 𝛼 cos 𝛽 − cos 𝛼 sin 𝛽, find an expression for sin (𝛼 + 𝛽).

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