Question 1058206
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Given sin u = - sqrt 13/7, 3 pi/2 < u < 2pi, use the half angle identies to find the exact value of sin(u/2), cos (u/2), tan(u/2). 
Determine the quadrant in which the angle u/2 terminates.
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The function "sine" can not be equal to {{{-sqrt(13/7)}}}.


Never.