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Trigonometry : Double Angle Formula

I need to verify this expression and I'm stuck... should I divide both sides by 2 first? Please advise as to the proper steps to take in this verification.

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Note that 4sinxcosx+2=2sin(2x)+2 is equivalent to 4sinxcosx=2sin(2x) (if we take away 2 from both sides); ...

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The double angle formula is used to verify a trigonometric equality. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.