Recent content by nelraheb

Thank you all ... I can do it now following your steps The rule supplied by Dextercioby did not look familiar (but it's correct I checked) ..well memory is not what it used to be :) isn't that a bit complicated though ... I thought the answer should be more straight forward .. any way thank...

Well that's a good point. How did I miss that :) Now for the first step please how did we expand Sin (A/2) Sin (B/2) Sin (C/2) to next step ie. How to start ... the rest is ok

For VietDao29 If A^2 + B^2 = 0 then we're stuck because no two +ve numbers addto zero ...right ? Then it should be A^2 = - B^2 How did you expand 1st step How did you get last step please go in more details

For AI thank you but this won't do

Sure .. I tried but had no success .. If you find an answer please post your steps

Trig identities please help In triangle ABC if sin (A/2) sin (B/2) sin (C/2) = 1/8 prove that the triangle is equilateral please show steps