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August 29, 2015

Homework Help: trigonometry

Posted by Yulieth on Sunday, November 20, 2011 at 11:12pm.

given tanθ= -2√10/3 and π/2<θ< π find:
sin2θ
tan θ/2

given sinθ=-5/13 and π<θ<3π/2 find
sin2θ
cos( θ-4π/3)
sin(θ/2)

can some1 explain this to me please?

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