Trig. half-angle formulas help?

Cameron Mccraw

New member
I'm not looking for just an "answer". I'd really like work shown so I can see what I am doing wrong.

Assume that for some value of "u" in the interval (pi, 3pi/2) ,sin(u) = - 1/6.
Find the following values exactly.

sin(u/2)
cos(u/2)
tan(u/2)


Thanks in advance.
 
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