Question Video: Proving the Addition Formula for Sine from its
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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 (๐ผ โ ๐ฝ) = sin ๐ผ cos ๐ฝ โ cos ๐ผ sin ๐ฝ, find an expression for sin (๐ผ + ๐ฝ).
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