Prove Trigonometric Identity Using Double Angle Formula

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#SumToProductTrigIdentity #CompoundAngleIdentities #EquivalentTrigonometricExpressions #mhf4utrigonometry #CofunctionIdentity #relatedAcuteAngle #mhf4u_trigonometry #trigonometric_identities_Test #CompoundAngle #LinearTrigonometricEquations #QuadraticTrigonometricEquations
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Good day sir, great video 👍, but how did you get rid of the 2sinxcosx?

notperfect_but_god_is
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I was shocked when I later say that the answer was the same as the left side 😂😂

SergioAlkan