PreCalculus - Trigonometry: Trig Identities (32 of 57) Proof Half Angle Formula: sin(x/2)

Описание к видео PreCalculus - Trigonometry: Trig Identities (32 of 57) Proof Half Angle Formula: sin(x/2)

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In this video I will introduce the half-angle formula sin(x/2)=?

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