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April 1, 2015

April 1, 2015

Posted by **CJ** on Thursday, January 13, 2011 at 1:23am.

- Math -
**MathMate**, Thursday, January 13, 2011 at 8:09amUse the double angle formula:

sin(2θ)=2sin(θ)cos(θ)

given

sin(θ)=1/5

cos(θ)=sqrt(1-(1/5)²))=sqrt(24)/5

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