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August 3, 2015

Homework Help: math

Posted by Yulieth on Sunday, November 20, 2011 at 8:24pm.

given sinθ=-5/13 and π<θ<3π/2 find

sin2θ
cos( θ-4π/3)
sin(θ/2)

can some1 explain to me how to do these?

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