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May 28, 2015

Homework Help: mathematics

Posted by Yuli on Monday, November 21, 2011 at 5:35am.

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

a.sin2θ

b.tan θ/2

could some1 help me with these 2 they're the only ones i couldn't get

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