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PreCalculus - Trigonometry: Trig Identities (19 of 57) Proof Using Addition & Subtraction Formulas
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In this video I will prove the trigonometric identity sin(A+B)-sin(A-B)=2cosAsinB.
In this video I will prove the trigonometric identity sin(A+B)-sin(A-B)=2cosAsinB.
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