SOLUTION: i need help please! Find cos(u/2) if tan(u)=−1.582 and u is in Quadrant-II. cos(u/2)=??

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Question 978388: i need help please!
Find cos(u/2) if tan(u)=−1.582 and u is in Quadrant-II.
cos(u/2)=??

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+tan%28u%29+=+-1.582+
+u+=+arctan+%28+-1.582+%29+
By my calculator:
+u+=+180+-+57.7026+ degrees
+u+=+122.2974+
+u%2F2+=+61.149+ degrees
+cos%28+61.149+%29+=+.4825+
Hope I got it