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January 25, 2015

January 25, 2015

Posted by **rose** on Thursday, November 22, 2012 at 9:51pm.

- math -
**Steve**, Thursday, November 22, 2012 at 11:47pmsin2θ = 2sinθ cosθ

so,

sin2θ / 2cosθ = 2sinθ cosθ/2cosθ = sinθ

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