Trigonometry (11th Edition)
Trigonometry (11th Edition)
11th Edition
ISBN: 9780134217437
Author: Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher: PEARSON
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For sin(u/2), cos(u/2), and tan(u/2) given cos(u)=-sqrt2/3 and sin(u)>0

I got sin(u/2)=sqrt(3+sqrt2)/sqrt6

cos(u/2)=sqrt(3-sqrt2)/sqrt6

tan(u/2)=sqrt(3+sqrt2)/sqrt(3-sqrt2)

Are these correct?

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