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A dump of our free Chat sessions, in case it is useful. It excludes white boards used during paid sessions.

tutorsd6 : Please, share your Math problem...
tutorsd6 : question please
student : Use half-angle identities to find the exact values of sin(u/2) and cos(u/2) when sin(u)=-4/5, 3π/2<u<2π
student : i don't get any of it
tutorsd6 : sin ( u ) = 2 x sin u x cos u
tutorsd6 : sorry
tutorsd6 : sinu = 2 x sin(u/2 ) x cos ( u/2 )
student : how would you get rid of the x's
tutorsd6 : 3π/2<u<2π
3π/4<u/2<2π /2 = > 135 deg < u/2 < 180 , it is in the 2nd quardant

student : yea i get that part
student : i don't get how to fine values
student : can set up the problem i just can't slove it
student : i don't get how to fine values
student : yea i get that part
tutorsd6 : Please send the question to us : tutor@aafter.com
or call Phone: 866-930-6363
We will send you the solution to your mail within 2/3 hours .

student : ok will do

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